Environment and Conservation

Overview

Environment and Conservation is a core topic in EVS for HTET Level 1 (PRT), designed to help teachers explain ecological concepts to young learners (Classes I-V). This topic covers pollution types and their effects, biodiversity and its importance, and sustainable living practices. Questions typically test both content knowledge and the ability to relate these concepts to a child's everyday experience.

For HTET, expect 3-5 questions on this topic covering identification of pollution types, biodiversity examples from local contexts, and simple conservation measures children can practice. The pedagogical angle often asks how to make these abstract concepts concrete for primary students through activities, local examples, and observation-based learning.

Key Concepts

• **Environment** comprises all living (biotic) and non-living (abiotic) components surrounding an organism — air, water, soil, plants, animals, and humans interacting together.

• **Pollution** is the introduction of harmful substances (pollutants) into the environment that cause adverse changes — classified into air, water, soil, and noise pollution.

• **Biodiversity** refers to the variety of life forms in an area — includes diversity within species, between species, and of ecosystems.

• **Ecosystem** is a functional unit where living organisms interact with each other and their physical environment — pond, forest, and desert are common examples.

• **Food Chain and Food Web** show how energy flows from producers (plants) to consumers (animals) — disruption affects the entire chain.

• **Conservation** means protection, preservation, and wise use of natural resources — includes forests, wildlife, water, and soil.

• **Sustainable Living** involves using resources in ways that meet present needs without compromising future generations — reduce, reuse, recycle (3Rs).

• **Endangered Species** are plants and animals at risk of extinction — tiger, one-horned rhinoceros, and lion-tailed macaque are Indian examples.

Key Facts

| Category | Must-Remember Facts | |----------|---------------------| | Air Pollution | Caused by vehicle exhaust, factory smoke, burning of waste; leads to respiratory diseases, acid rain | | Water Pollution | Caused by industrial waste, sewage, pesticides; affects aquatic life, causes waterborne diseases | | Soil Pollution | Caused by pesticides, plastic, industrial waste; reduces soil fertility | | Noise Pollution | Caused by vehicles, loudspeakers, machines; threshold above 80 decibels harmful | | Biodiversity Hotspots | India has 4 hotspots — Western Ghats, Himalayas, Indo-Burma, Sundaland | | Protected Areas | National Parks (no human activity), Wildlife Sanctuaries (limited activity), Biosphere Reserves (conservation + research) | | Important Days | World Environment Day — 5 June; Earth Day — 22 April; World Wildlife Day — 3 March | | 3Rs Principle | Reduce consumption → Reuse items → Recycle waste | | Chipko Movement | 1973, Uttarakhand — villagers hugged trees to prevent felling; led by Sunderlal Bahuguna | | Project Tiger | Launched 1973 — India's tiger conservation programme |