Chapter Notes

Introduction

Economic development is essential for any country, but in India, it has come at a high price: the degradation of our environmental quality. As we pursue higher economic growth, it's crucial to learn from the past and choose a path of sustainable development. This involves understanding the vital role the environment plays in the economy, recognizing the current environmental challenges India faces, and adopting strategies that allow for development without destroying our natural world.

Environment - Definition and Functions

The environment is defined as the total planetary inheritance and the sum of all resources. It is a complex system that includes:

• Biotic elements: All living things, such as birds, animals, plants, forests, and fisheries.
• Abiotic elements: All non-living things, such as air, water, land, rocks, and sunlight.

The environment is not just a collection of these elements; it is the inter-relationship between them that sustains life.

Functions of the Environment

The environment performs four critical functions that support all life and economic activity:

1. It supplies resources: These include both renewable and non-renewable resources.
   • Renewable resources are those that can be used without being depleted, as they regenerate. Examples include trees in a forest or fish in the ocean.
   • Non-renewable resources are those that get exhausted with use, like fossil fuels (coal, petroleum).
2. It assimilates waste: The environment has a natural ability to absorb and break down waste products generated by production and consumption.
3. It sustains life: It provides the essential genetic and biodiversity that are the building blocks of life on Earth.
4. It provides aesthetic services: This includes the beauty of natural scenery, which enhances our quality of life.

Carrying Capacity and Environmental Crisis

The environment can perform its functions without interruption as long as the demands placed on it are within its carrying capacity. This means two conditions must be met:

• The rate of resource extraction must not be higher than the rate of their regeneration.
• The amount of waste generated must be within the absorptive capacity of the environment (its ability to absorb degradation).

When these limits are crossed, an environmental crisis occurs. Today, this is the situation worldwide. A rising global population and high consumption standards have put immense stress on the environment. Resources are becoming extinct, and the waste generated is far beyond what the environment can naturally handle.

The Reversal of Supply and Demand

Environmental problems are not new, but their scale is. In the early days of civilization, before the population explosion and industrial revolution, the demand for environmental resources was much less than their supply. Pollution was within the absorptive capacity, and resource use was less than the rate of regeneration.

However, industrialization and population growth completely changed this relationship. The demand for resources for both production and consumption now far exceeds the environment's ability to supply them. This reversal of the supply-demand relationship is the root of today's critical environmental issues.

Global Environmental Issues

Two major global environmental challenges are global warming and ozone depletion.

• Global Warming: This is the gradual increase in the average temperature of the Earth's lower atmosphere. It is primarily caused by human activities, such as the burning of fossil fuels and deforestation, which release greenhouse gases (like carbon dioxide and methane) into the atmosphere.

  • Effects: Melting of polar ice, rising sea levels, coastal flooding, disruption of water supplies, extinction of species, and an increased incidence of tropical diseases.
  • International Action: The Kyoto Protocol, an international agreement signed in 1997, called for reductions in greenhouse gas emissions by industrialized nations.

• Ozone Depletion: This refers to the reduction in the amount of ozone in the stratosphere. The ozone layer is crucial as it protects the Earth from harmful ultraviolet (UV) radiation.

  • Causes: High levels of chlorine and bromine compounds, primarily from chlorofluorocarbons (CFCs) used in refrigerators and air conditioners, and halons used in fire extinguishers.
  • Effects: Increased UV radiation can cause skin cancer in humans, damage aquatic organisms, and affect the growth of plants.
  • International Action: The Montreal Protocol was adopted to ban the use of CFCs and other ozone-depleting chemicals.

State of India’s Environment

India is blessed with abundant natural resources, including rich soil (like the black soil of the Deccan Plateau), hundreds of rivers, lush forests, and vast mineral deposits such as iron-ore, coal, and natural gas. The Indo-Gangetic plains are one of the most fertile and intensively cultivated regions in the world.

However, developmental activities have put immense pressure on these finite resources, impacting human health and well-being.

The Dichotomy of Environmental Threats in India

India faces a unique two-sided environmental threat:

1. Poverty-induced environmental degradation: Poor communities often rely heavily on natural resources for survival, which can lead to overuse (e.g., cutting down forests for fuelwood).
2. Pollution from affluence and a growing industrial sector: A rapidly growing industrial sector and rising consumption standards lead to increased pollution and waste.

Pressing Environmental Concerns

Some of the most urgent environmental issues in India include:

• Land degradation and soil erosion
• Biodiversity loss
• Air pollution, especially from vehicles in cities
• Management of fresh water (70% of water in India is polluted)
• Solid waste management

Causes of Land Degradation

Land in India suffers from degradation due to unstable and inappropriate management practices. Key factors include:

• Loss of vegetation due to deforestation
• Unsustainable extraction of fuelwood and fodder
• Shifting cultivation
• Encroachment into forest lands
• Forest fires and overgrazing
• Improper crop rotation and use of agro-chemicals (fertilizers, pesticides)
• Over-extraction of groundwater

Air and Water Pollution

Air pollution is widespread in urban India, with vehicles being the major contributors. The number of motor vehicles increased from about 3 lakh in 1951 to 35 crores in 2022. India is also one of the world's most industrialized nations, which has led to unplanned urbanization and pollution.

To tackle this, the government set up the Central Pollution Control Board (CPCB) in 1974, followed by state-level boards. These boards are responsible for investigating and controlling water, air, and land pollution, setting standards for emissions, and raising public awareness.

Sustainable Development

Given the interdependence of the environment and the economy, a new model of development is needed. This model is called sustainable development.

This definition emphasizes intergenerational equity—the idea that we have a moral obligation to hand over the planet in good order to future generations.

Key Aspects of Sustainable Development

• Meeting Basic Needs: Sustainable development aims to decrease the absolute poverty of the poor by providing secure livelihoods and meeting basic needs like employment, food, energy, water, and housing.
• Conservation of Assets: It requires conserving natural assets and preserving the regenerative capacity of the world's ecological systems.
• Avoiding Risks for Future Generations: The present generation must avoid imposing added costs or risks on future generations.

According to environmental economist Herman Daly, achieving sustainable development requires:

1. Limiting the human population to a level within the environment's carrying capacity.
2. Ensuring technological progress is input-efficient, not input-consuming.
3. Extracting renewable resources at a rate no faster than their regeneration.
4. Depleting non-renewable resources at a rate no faster than the creation of renewable substitutes.
5. Correcting inefficiencies caused by pollution.

Strategies for Sustainable Development

To achieve sustainable development, India is adopting several strategies that focus on cleaner technologies and traditional wisdom.

Use of Non-conventional Sources of Energy

India heavily relies on thermal and hydro power, both of which have negative environmental impacts. Thermal plants emit greenhouse gases, while hydroelectric projects submerge forests. The solution is to shift to non-conventional, cleaner energy sources.

• Wind Power: Windmills can generate electricity in areas with high wind speeds without adverse environmental impact.
• Solar Power: India is naturally endowed with abundant sunlight. Photovoltaic cells can convert solar energy directly into electricity. This technology is pollution-free and ideal for remote areas. India is also leading the International Solar Alliance (ISA).

Cleaner Fuels

• LPG and Gobar Gas in Rural Areas: To reduce deforestation and indoor air pollution from burning wood and dung cakes, the government provides subsidised LPG. Additionally, gobar gas plants use cattle dung to produce clean fuel for cooking, and the leftover slurry serves as an excellent organic fertilizer.
• CNG in Urban Areas: In cities like Delhi, the use of Compressed Natural Gas (CNG) in public transport has significantly lowered air pollution.

Other Eco-Friendly Practices

• Mini-hydel Plants: In mountainous regions, small turbines can use the energy of perennial streams to generate electricity for local use, avoiding the need for large-scale transmission lines.
• Traditional Knowledge and Practices: India has a rich history of environment-friendly practices in agriculture, healthcare, and housing. Reviving traditional healthcare systems like Ayurveda and Unani, which use medicinal plants, reduces reliance on industrial chemical processing and has fewer side effects.
• Biocomposting: Instead of chemical fertilizers that pollute soil and water, farmers are returning to compost made from organic waste. Vermicomposting (using earthworms) can speed up this process.
• Biopest Control: To avoid the harmful effects of chemical pesticides, there is a growing shift towards biopest control. This includes using pesticides based on plant products like neem and encouraging natural predators like snakes, owls, and lizards to control pests.