Environment and Sustainable Development

This section introduces economic development and its historical impact on the environment. While it provides context, it lacks the specific technical facts, statistics, or institutional details that UPSC targets in Prelims. Aspirants should skip this and proceed directly to the functional definitions to save time, avoiding general narrative traps.

Explains the four vital functions of the environment: resource supply (renewable vs. non-renewable), waste assimilation, life sustenance, and aesthetic services. It introduces critical concepts like carrying capacity (resource extraction below rate of regeneration, waste within absorption capacity) and the absorptive capacity of the environment. UPSC frequently tests these conceptual thresholds (carrying capacity, ecological overshoot). Watch out for traps confusing renewable resource depletion rates with non-renewable stock limits.

Deals with India's rich biodiversity, threatened by population pressure. Highlights land degradation (soil erosion, water logging, salinity), biodiversity loss, and air/water pollution. Mentions key institutions like the Central Pollution Control Board (CPCB) established in 1974 under the Water Prevention and Control of Pollution Act. UPSC actively tests CPCB's statutory origin, powers, and the Air (Prevention and Control of Pollution) Act 1981. Watch out for traps regarding CPCB's parent ministry (MoEFCC) versus its statutory acts.

Defines sustainable development based on the Brundtland Commission Report (1987) 'Our Common Future' (meeting needs of present without compromising future generations). Introduces Edward Barbier's definition emphasizing optimal flow of benefits. Explains Herman Daly's rules for sustainability (limiting human population, input-efficient technological progress, renewable extraction within regeneration rate, non-renewable depletion matched by renewable substitutes). These precise rules are high-yield for conceptual MCQ statements.

Outlines practical shifts: Use of Non-conventional Sources of Energy (wind, solar), LPG and Gobar Gas in rural areas, CNG in urban public transport, Wind Power, Solar Power through Photovoltaic cells, Mini-hydel plants, Traditional Knowledge and Practices (ayurvedic medicine, organic farming), Bio-pest Control (neem-based pesticides, use of predators like birds/snakes). Highly testable as UPSC focuses on alternative agriculture and clean energy policies. Beware of traps that overstate the current share of solar or wind in India's total energy mix.