eChapters

Introduction 
The ancient educational systems of renowned universities not only advanced knowledge across various disciplines but also significantly influenced the economic and social structures of their times. Education serves as a gateway to liberation and development, providing individuals with a wealth of opportunities. Conversely, a lack of education limits one’s ability to pursue personal and professional aspirations. In the educational environment, the initial relationship a child forms is with their teacher. When teachers understand their students, it fosters strong relationships, effective communication, innovative learning approaches, and capacity building. Since students spend a significant portion of their day at school, mutual respect and tolerance between students and teachers are essential for a productive learning environment. Over recent years, the education system has evolved rapidly, incorporating new teaching methods and strategies as alternatives to traditional models. However, traditional views often assert that “learners must submit themselves to teachers” (Menges, 1977, p.5), implying that teacher authority is crucial for student learning. Hurt, Scott, and McCroskey (1978) argued that a certain degree of teacher authority is always present in the classroom, and its usage tends to reinforce the need for more control. This perspective highlighted the critical role of the classroom as a space for students’ educational success (Anderson & Burns, 1989; Borich, 1988; Fraser & Walberg, 1991; Walberg, 1968). Positive teacher-student relationships are essential for fostering a sense of belonging and encouraged cooperative participation in classroom activities (Hughes & Chen, 2011, p.278). Such relationships not only engage students in learning but also enhance their holistic development, social skills, and confidence. As we know, historical institutions such as Takshila and Nalanda exemplify ancient centers of learning that combined theoretical and practical education. Takshila, located in present-day Pakistan, was one of the earliest centers of higher learning in ancient India, offering diverse subjects including medicine, engineering, astrology, and statecraft. Nalanda, in present-day Bihar, was a prominent center for Buddhist learning, focusing on philosophy, logic, and practical subjects like agriculture and technology. These ancient educational hubs were pivotal in advancing knowledge and contributing to the economic and intellectual development of their societies. The principles of vocational education and holistic development emphasized in the National Education Policy (NEP) 2020 align with these historical practices (Makam, 2022). Effective implementation of NEP 2020 requires a fresh approach through comprehensive teacher training and rigorous evaluation of expectations and feedback focused on Sustainable Development Goal 4 (SDG4) is focused upon to create a relation with ancient practices.

Introduction
In recent years, global attention has increasingly focused on the interconnection between health, happiness, and sustainable development, recognizing their collective role in enhancing quality of life. Often viewed as personal endeavors these elements drive societal well-being and contribute to long-term sustainability. In this context, rooted in ancient India, yoga has become vital in promoting individual wellness and broader social progress. Yoga offers holistic benefits that address well-being across multiple dimensions—physical fitness, mental clarity emotional balance, and social cohesion—making it an invaluable approach to fostering contentment and sustainable living. Yoga integrates mindfulness minimalism, and responsible consumption, aligning with global initiatives to address environmental issues and advance sustainable development goals (SDGs). This chapter explores the transformative potential of yoga in promoting health, happiness, and sustainability. By reviewing its role in physical and psychological well-being, social development, and ecological consciousness, the chapter aims to demonstrate how yoga can serve as a personal wellness practice and a contributor to global sustainable development efforts. Through this examination, we can better understand the broader impacts of yoga, highlighting its capacity to support individual transformation while contributing to a more equitable and sustainable world.
Yoga: Historical and Philosophical Foundations
Yoga has its roots in ancient India, dating back over 5,000 years, which was developed as a system of physical, mental, and spiritual practices aimed at achieving harmony and self-realization (Sengupta, 2012). The term “yoga” is derived from the Sanskrit root yuj, which translates to “to unite” or “to join.” This signifies the interconnectedness of the body, mind, and spirit. The philosophical foundations of yoga are laid out in texts such as Patanjali’s Yoga Sutras and the Bhagavad Gita where yoga is described as a path to achieving balance, clarity, and peace through discipline, meditation, and ethical living. One of the significant branches of this system is Hatha Yoga, which emphasizes physical postures (asanas), breathing control (pranayama), and mental concentration. Hatha yoga is deeply rooted in ancient Indian texts such as the Hatha Yoga Pradipika by Svatmarama and the Gheranda Samhita, where it is described as a tool for mastering body and mind. While traditional yoga aimed at spiritual liberation, Hatha yoga was mainly concerned with physical and mental control, often seen as preparatory for more profound meditative practices. In the modern world, yoga has evolved into a global wellness practice, emphasizing physical postures (asanas), breathing techniques (pranayama) and meditation. This adaptation has made yoga accessible to a diverse audience including those seeking physical health, mental clarity, or spiritual growth. Yoga’s core values of mindfulness, non-attachment, and ethical living continue to offer relevant solutions to contemporary challenges, such as mental health, sustainability and social responsibility. Its holistic nature makes it a valuable tool for fostering individual well-being while promoting broader ecological and societal harmony.

Introduction

In the last two decades global climate change has perceptible and marked impact on the monsoon pattern in India. Delayed and inadequate monsoon has become a recurrent feature and the country is in the grip of drought-flood cycles. Right from the beginning of large scale irrigation that brought green revolution and food self sufficiency to the country, there is a strong feeling that full potential of rivers of the country is not tapped (Table 1).

1.    Introduction    3
2.    History and Scope of Microbiology    4
    2.1.    Controversy over the origin of microorganisms, 5
    2.2.    Germ theory of fermentation, 6
    2.3.    Germ theory of disease, 6
    2.4.    Development of laboratory techniques and pure cultures, 7
    2.5.    Discovery of immunization, 7
    2.6.    Discovery of protection against infection, 8
    2.7.    Discovery of chemotherapeutic agents, 8
    2.8.    Microorganisms as geochemical agents, 9

As global climate change becomes an increasingly urgent concern, the search for sustainable and renewable energy sources has intensified. Among the alternatives to fossil fuels, biofuels have emerged as a promising solution due to their potential to reduce greenhouse gas emissions and dependence on petroleum. Biofuels are derived from organic matter, such as crops, agricultural residues and other biomass, which can be converted into energy sources like ethanol, biodiesel, and biogas. For instance, crops like corn and soybeans contain oil extracts that can be processed into biofuels, offering a renewable and environmentally friendly alternative to traditional fossil fuels (Demirbas, 2009). However, the potential of biofuels extends beyond these conventional sources, as researchers explore a wide range of organic materials that can be sustainably regrown and harvested, minimizing ecological impacts (Naik et al., 2010). Biofuels have gained significant importance in both developed and developing economies, driven by their potential to enhance energy security and reduce carbon footprints. In 2023, the United States led global biofuel production with 15,550 million gallons, followed by Brazil with 8,260 million gallons. India ranked third, producing 1,430 million gallons of bioethanol and achieving an E11.7 blend rate during the 2022–2023 period. This blend was sourced from various feedstocks, including sugarcane juice (5%), cane molasses (5%), and damaged food grains (DFG) (1.7%). Historically, India’s ethanol production has relied heavily on sugarcane molasses, but the National Biofuel Policy (NBP) of 2018 has been instrumental in promoting the use of biofuels to reduce fossil fuel dependence, mitigate greenhouse gas emissions, and strengthen energy security (Ministry of Petroleum and Natural Gas, 2018). India, the third-largest energy-consuming nation globally, faces considerable challenges due to its heavy dependence on imported oil, posing risks to both economic stability and strategic security. With its share of global energy consumption projected to double by 2050, the country is actively seeking domestic alternatives to curb this reliance. Ethanol, produced within India, has emerged as a viable substitute. Since its initial pilot in 2001, ethanol-blended petrol has demonstrated notable environmental advantages, with every 10 million liters reducing CO2 emissions by 8,000–17,000 tonnes compared to conventional

1.1 An overview of biomass

Biomass is an abundant and renewable energy source that has the potential to meet the growing need for clean and sustainable energy solutions. This chapter provides an overview of biomass, its potential, and conversion technologies, which include various techniques for transforming biomass into useful forms of energy such as heat, electricity, and biofuels.

Biomass is an organic substance that can be obtained from agricultural crop waste, forest waste, animals, and microorganisms. It can be used as an energy source or a primary material in various applications. The energy in biomass is derived from photosynthesis, in which plants convert sunlight, carbon dioxide, and water into organic matter.

1.1 Introduction

The life on the earth is driven by the energy available in the various forms. Energy is the most crucial entity in development of the world. The sufficient and sustainable supply of energy is deciding factor in the global energy market. Solar energy from the sun is the basic source of energy on the earth which further manifest into the other energy forms. However, the fossil fuel energy is widely used energy on the larger scale on commercial basis due to its availability and technological advancement in handling these fossil fuels.

1.1 Forest Resources

Forest resources usually provide the raw materials for homes, workplaces, the books and newspapers, and the packaging that contains food and other products of our labor. Forest ecosystems supply our water, maintain our climate, and help purify the air, protect soils, and provide for wilderness experiences. Forests provide habitat for wildlife, and serve as preserves of biological diversity. Forests are sources of food, fuel and medicine for people all over the world. Forests shape the recreational landscape, help stabilize our farms, and enhance our cities.

About 30 per cent of the world’s total land areas are covered by forest with the area of 3.9 billion hectares. Nearly 47 percent of the world’s forests are in the tropics, 33 percent in the boreal zone, 11 percent in the temperate zones, and 9 percent in sub-tropical areas. The 94 million hectares of forest lost over the ten-year period, represented about 2 per cent of the world’s total forest cover, or an area larger than Venezuela. Two thirds of the world’s forests are located in ten countries: the Russian Federation, Brazil, Canada, the United States, China, Australia, the Democratic Republic of the Congo, Indonesia, Angola and Peru. Most of the deforestation work was performed in natural tropical forests, which lost 14.2 million hectares a year over the last decade. Africa and South America have suffered the most deforestation.

Africa was the region with the highest deforestation in the world, which lost 5.3 million hectares of forest per year in the 1990s. Forests are a major factor in the climate change issue. Forest ecosystems contain more than half of all terrestrial carbon, and account for about 80 per cent of the exchange of carbon between terrestrial ecosystems and the atmosphere. Deforestation in the 1980s may have accounted for a quarter of all human-induced carbon emissions, the second greatest emitter after fossil fuels. Forest plantations comprise 5 percent of the world’s forests. Asia has the largest area of plantations, accounting for 62 per cent of the world total. China accounts for 24 percent of that total and India, 18 per cent. Plantations supply about 35 percent of the world’s round wood. The area of forest plantations increased by an average of 3 to 4 million hectares per year during the 1990s. Half of this increase was the result of afforestation on land previously under non-forest land use, whereas the other half resulted from conversion of natural forest. There are reports that 12 percent of the world’s forests, or about 480 million hectares, are in protected areas.

The Renewable energy (also called green energy) is generally defined as energy that comes from resources which are naturally replenished on a human timescale. In other words, Renewable energy is energy derived from natural sources that are replenished at a higher rate than they are consumed. The most widely used renewable energy types are solar energy, wind energy,biomass energy, and hydroenergy.
India has made significant progress in the renewable energy sector, with renewable energy accounting for 43.12% of the country’s total installed power generation capacity. Globally, India ranks 4th in overall renewable energy capacity, 4th in wind power with 46.65 GW, and 5th in solar photovoltaic power with 85.47 GW. The country has surpassed 200 GW of non-fossil fuel energy capacity which includes 85.47 GW of solar power, 46.93 GW of large hydropower, 46.66 GW of wind power, 10.95 GW of biopower, 5.00 GW of small hydropower, and 0.60 GW of waste-to-energy capacity.
Presently India has set ambitious renewable energy targets. By 2030, the country aims to achieve 500 GW of non-fossil fuel energy capacity and meet at least 50% of its total energy requirements through renewable sources. These efforts position India as a global leader in the transition towards sustainable and clean energy.
In recent years, India’s renewable energy capacity has grown rapidly. As per the Ministry of New and Renewable Energy (MNRE, 2025), the country’s total installed renewable energy capacity (excluding large hydro) reached 220.10 GW by March 2025. When large hydro and nuclear power are included, the non-fossil fuel capacity has crossed 242.8 GW, representing over 50 percent of India’s total

1.1 Introduction to Sustainable Energy
The idea of sustainable energy has come to light in the twenty-first century as the globe struggles with rising energy demands, environmental degradation, and the menacing threat of climate change. It offers hope and a way forward for a more promising future. A major change in the production, distribution, and consumption of energy resources is what sustainable energy entails. It is a paradigm that includes a range of clean and renewable energy sources, technologies, and methods with the goal of supplying our energy demands with the least amount of harm to the environment (Andrews and Shabani, 2014). 1.2 Importance of Sustainable Energy Sources Sustainable energy is of paramount importance due to several interconnected reasons listed below and shown in Figure 1:
1.2.1 Environmental Concerns: For many years, conventional fossil fuelbased
energy sources like coal, oil, and natural gas have formed the foundation of our energy system. But as they burn, greenhouse gases (GHGs) mostly carbon dioxide (CO2) are released into the environment (Hosseini and Wahid, 2016). These greenhouse gases are the main causes of climate change, which raises global temperatures, brings on harsh weather, and raises sea levels. Conversely, sustainable energy sources are crucial for reducing climate change because they emit little or no greenhouse gases when in use.
1.2.2 Finite Nature of Fossil Fuels: Because fossil fuels are limited resources,
their stocks are running out quickly. The task that follows is to ensure that future generations have access to economical and dependable energy sources. Because they are renewable or endless, sustainable energy sources provide a solution to the problem of energy security (Su-Ungkavatin et al., 2023).
1.2.3 Economic Benefits: Making the switch to renewable energy can be
very profitable. It can improve national energy security and lessen trade deficits by fostering innovation, generating jobs, and lowering dependency on energy imports. Furthermore, because they frequently have lower operating and maintenance costs than fossil fuel-based systems, sustainable energy technologies can result in cost savings over time (Shafiei et al., 2015).

Years ago before becoming the food producers, humans, for years remained food gatherers and the food collected from wild was sufficient to satisfy the food needs of human on the earth. The ever increasing population demanded more food to quench their hunger which is mainly served by plants but plants have limited intrinsic potential or threshold limit upto which it can put on biomass which ultimately could be consumed as food. Though by making certain modifications in the genetic make-up of the plant, the output can be altered. Before attempting any modification in the genetic make-up, it is necessary to understand the genetics and genetic behavior of the targeted plant. So the aim of studying the genetics and genetic behavior of the plants is to improve the quality and quantity of the produce. The inferences of genetics cannot be directly applied to the improvement but the principles of genetics and the genetic behaviors are set into particular situations. This part of genetics which deals with the improvement of the quality and quantity of the produce with the aim of benefitting mankind is called plant breeding.

India has a unique social and cultural setting with diverse people, culture and religions. It is one of the oldest and greatest civilizations of the world. Geographically India extends snow clad Himalayan mountains in the north to the tropical rain forests of the south. It is the 7th largest country in the world and well recognised in Asia by its mountains, seas, deserts, and vast stretch of fertile plain land, which give the country a distinct geographical identity.

India has a very rich, diverse religious and cultural heritage. The four main religions of India are - Hinduism, Islam, Christianity and Sikhism. Hinduism is the largest religion in India, with approximately 80% of the population is Hindu while Islam (Muslim) is the second-largest religion having 14% (approx.) share.

Religion in India is characterised by the diversity of religious beliefs and practices. In Indian history, religion has been an important part of the country's culture. Indian subcontinent is the birthplace of four of the world's major religions, namely, Buddhism, Hinduism, Jainism and Sikhism, which are collectively known as native Indian religions and represent 83% of the total population of India approximately.

Hinduism

Hinduism is the main Indian religion. It is considered as a religious and universal order, a way of life which followed by the people who believed in Hinduism. The word ‘Hindu’ refers group of particular people who believes and follow Hinduism, the oldest religion in the world. It has also been described as ‘Sanatana dharma’.

Arsenic contamination is one of the serious concerns for public health throughout the world. During the weathering of rocks and minerals, which are followed by subsequent leaching and runoff, arsenic (As) is released into the soil and groundwater. Additionally, human sources can transfer it into the soil and groundwater. Depending on the geological settings, geochemistry, and geo-environmental conditions of an aquifer, different aquifers may have different adsorption and desorption processes, arsenic species, Eh, pH, solid phase dissolutions, and precipitations. Therefore, rigorous geochemical investigation for an adequate understanding of arsenic geochemistry under different hydrogeological and geo-environmental conditions of aquifers is essentially required for evolving sustainable solutions. All of the arsenic affected river plains have river routes originated from the Himalayan region. Arsenic in groundwater contamination has far-reaching consequences including its ingestion through the food chain, which are in the form of social disorders, health hazards and socioeconomic dissolution besides its sprawling movement, and exploitation of groundwater. Food crops produced with arsenic tainted water are marketed to other locations, including areas where people may eat the tainted food and be exposed to arsenic. The arsenic contamination of groundwater is a form of groundwater pollution which is due to naturally occurring high concentrations of arsenic in deeper levels of groundwater.

Any perturbation and chaos in ecological setting and its functioning will lead to serious disruptions disruption in both resilience and livelihood. This is exactly what is being confronted by Indian Agriculture upfront. Our soils are brutally extorted to accept the harsh reality that close to 70 per cent of our cultivable land is starving of organic carbon. The ground water depletion in the name of modern agriculture has been another testimony of our ruthlessly prodigal agriculture amounting to serious water crisis. Every five seconds equivalent to a football ground, the golden acres, are vanishing with fertile soil from the chest of the planet. Thus, soil erosion amounting to almost 15 tons per hectare per year in Indian agriculture is not only alarming but also humongous. The losses of biodiversities including floral and faunal counts are adding blistering blistering barrier for our food production system. In the name of green revolution, we turned wrongly illusioned with the ability of so called high yielding varieties and have driven out our valuable landraces to invite gene myopia and gene erosion. This has got a catastrophic consequence. The stagnation of production and productivity in food sector is going to be the bleak indicator of our fragile and frail ecological resilience in the entire production system. But the down to earth reality is that apart from experts, most of our farmers are not aware of this threat, sensitized either. The book has assimilated the data in a delving manner, and real time fact of ground reality that reveals an interesting interpretation of farmers' perception on the rhetoric’s of ecological resilience in India.

1.1. Background

Once this beautiful planet conceived human civilization with the glory of motherhood, the birds kept on twittering in an ecstasy of joy and freedom; the ripples of pristine rivers, blue and giggling, offered shelter to silvery fishes and pink Amazon Lilies! But human greed has defeated its own needs. So, what had been a means to survive now has turned into tools to triumph, rather, a weapon to destroy her own creation. By this time, we have transformed fertile lands into a barren Arizona, deep forests into a nasty slums and blue rivers into a filthy stream, called Yamuna.

The advent of the Anthropocene, implies that an unprecedented era of human impact on the natural environment, is now so large that the Earth has entered a new geological epoch; it is leaving the Holocene, the environment within which human societies themselves have developed (Gornish and dos Santos, 2016; Reynolds, 2021). Climate change is a prominent sign of human- driven changes to the global environment. There is every reason to be alarmed about anthropogenic climate change, pollution, and biodiversity loss, all of which have been accelerating in recent decades and do pose “existential crisis” (Díaz et al., 2020; Abhilash et al., 2021). Sixth Assessment Report of Intergovernmental Panel on Climate Change (IPCC) released on February 28, 2022, paints a troubling picture as limiting global warming to 1.5oC (a global target in the Paris Climate Agreement) is not safe for all. If warming exceeds 1.5oC, even temporarily, much more severe, often irreversible effects of climate change will occur, land and ocean temperature change, sea level rise and ocean acidification, loss of Arctic Sea ice and ice sheets, stronger storms, longer heatwaves and droughts, abrupt precipitation mainly intensity and seasonal distribution, thawing permafrost and more (IPCC, 2013). On the basis of the Sixth Assessment UN Secretary-General António Guterres said “The alarm bells are deafening, and the evidence is irrefutable: greenhouse gas emissions from fossil fuel burning and deforestation are choking our planet and putting billions of people at immediate risk.” According to the United Nations (2015), there are still 836 million people in the world living in extreme poverty (less than USD,1.25/ day). And according to the International Fund for Agricultural Development (IFAD), at least 70% of the very poor live in rural areas, most of them depending partly or completely on agriculture for their livelihoods. It is estimated that 500 million smallholder farms in the developing world are supporting almost 2 billion people, and in Asia and sub-Saharan Africa these small farms produce about 80 percent of the food consumed (IFAD, 2011). The rural poor often depend partly on forests for their livelihoods (World Bank, 2002). It is estimated that between 660 and 820 million people (workers and their families) depend totally or partly on fisheries, aquaculture and related industries as a source of income and support (HLPE, 2014).

1.1 General

Access to energy is a crucial enabling condition for achieving sustainable development. Prudent energy policies and research can play an important role in steering both industrialized and developing countries onto more sustainable energy development paths. Specifically, they can strengthen the three pillars of sustainable development: the economy, by boosting productivity, social welfare, by improving living standards and enhancing safety and security, and the environment, by reducing indoor and outdoor pollution and remediating environmental degradation.

1.2 Energy and it’s Requirement

Energy in any form is necessary to meet many of our requirements. It’s varying definitions shows the importance of energy in our life.

1.1 Man’s place in Nature

All religions of the world share the view that man is the supreme being among God’s creations. He is the only one among many creatures to enjoy nature’s beauties and bounties. Nature is given to him so as to make responsible and judicious use of it. No religion justifies the most destructive attitude the modern man has developed towards his environment. All religions urge man to treat nature as a God-given gift, stating that God is omnipresent in the manifestations of the nature. It is irreligious for man to expect miracles and exploit the environment. Man must be confronted with the reality that struggle is essential for life rather than “struggle for existence.”

1.1 Weather

Firstly, what is weather? Simply, the conditions in the atmosphere above the earth is called weather. It refers to the conditions such as wind, rain and temperature, prevailing at a particular location during periods of hours or days. We often ask “what’s the weather like today”? Any individual can answer to this question as it requires only a short term experience or say exposure to the atmosphere. The TV news forecasters predict weather each day and inform about the temperature, cloudiness, humidity, or possibility of storm in the next few days. Weather is localised, say, it’s a hot and cloudy weather in one part of the country and dry and windy on the other part.

1.1.1 What are the factors that influence weather?

Before we try to understand the factors that influence weather, we must understand what the components that describe a weather conditions are? Is it the rains, or the air temperature or both? The answer to this question is not so easy, and it’s a bit complicated. There are many components that constitute weather. Weather components include rain, cloud cover, sunshine, winds, hail, snow, sleet, storms, thunderstorms, heat waves and many more. These components are sometimes referred as weather parameters or climate elements. Each of these components define weather patterns of a particular area. These components determine the status of local atmospheric conditions. Again, as a basic definition, weather is the state of the atmosphere and majority of weather phenomena occur in the lowest layer of the atmosphere, called as the troposphere. Does it mean that ground conditions such as the topography, water bodies and vegetation of a particular area has nothing to do with it? No, it is not so. The state of the atmosphere is subjected to various processes taking place not only in the atmosphere but also in the ocean, the sea-ice, the vegetation, etc. Weather parameters or the components of weather form a sequence of events, and the influences are far reaching and they do not remain solely in the atmosphere. For example, terrestrial radiation impacts the air temperature, air pressure and humidity. The terrestrial location also influences the cloud formation. The clouds may or may not turn into precipitation depending on the outcome (cloud or rain), which is by and large governed by troposphere. Likewise, a lack of precipitation affects not only weather conditions, but also soil moisture conditions that may result in lowering of water levels (ground water table) in soil. Wind speed and direction are governed by the atmospheric pressure and air temperature. So, all these parameters or components are interrelated and the weather conditions are the outcome of their interactions. Therefore, we can say that, the three main components of weather are temperature, precipitation and solar radiation. These components are influenced by different factors.

Introduction

Urbanization, a vital global phenomenon, refers to the process of city establishment and growth; the term commonly connotes population increase in the city from internal growth and immigration as well as their spatial expansion (Revi, 2007). Recent developments, uncontrolled population growth have been linked with the process of urbanization. Urban areas cover 3% of the global land but it gives shelter to nearly 26% of the global population (U.S. De, 2009). Increase in population growth and industrialization is posing threat to natural resources such as land air and water. Anthropogenic factors have led to change in land use pattern, high energy consumption, high level of generation of waste etc. As per UN survey, by 2050, approximately 70 percent of the global population will be living in cities (UN, World Urbanization Prospects, 2014). Unplanned growth is damaging the existing ecosystems along with that causing climate change and loss of biodiversity.