Important questions based on NCERT syllabus for Chapter 15 - Our Environment:
Question-1: What does waste mangagement means? How can you help in reducing the problem of waste disposal? Give any two methods.
Solution: 1. Waste management means collection, transportation, processing or disposal, managing and monitoring of waste materials to minimize its consequences on humans and environment.
2. By separating biodegradable substances from non-biodegradable substances. Produce compost and biogas from biodegradable waste.
3. By reducing, reusing and recycling non-biodegradable substances. Reduce the volume of waste by burning in incinerator.
Question-2: What changes would you suggest at home to make it more environment friendly?
Solution: 1. You can reduce, reuse, and recycle materials to decrease household waste.
2. In your lawn and garden, feed your soil with compost, make compost at home with remains of household wastes. At home, reduce food waste by using up the food you already bought.
3. Reuse whatever possible to avoid wastage. Return used car tires to retailers or wholesalers that recycle or retread them. Buy recyclable cans and recycle papers.
Question-3: How have human activities affected the depletion of flora and fauna? Explain.
Solution: Several human activities have affected the depletion of flora and fauna and has led to decline in India’s biodiversity. The main factors responsible for this damage are:
- Habitat destruction, mainly due to overpopulation leading to expansion of agriculture, mining, industrialisation and urbanisation and consequent wiping out of large forest areas.
- Hunting and poaching and illegal trade of animal skin, tusk, bones, teeth, horns, etc have lead many speices to the verge of extinction.
- Environmental pollution, poisoning of water bodies due to discharge of industrial effluents, chemicals, wastes, etc. leading to animal deaths.
- Forest fires often induced by shifting cultivation wiping out valuable forests and wildlife.
- Large scale development projects and destruction of forests.
- Grazing and fuel wood collection. Over-exploitation of forest products