Science, asked by harshraj123hk, 17 days ago

D. Answer these questions. 1. How do people living near rivers pollute water? 2. Write two ill-effects of water pollution. 3. What is biodegradable waste? 4. Write two ways by which air pollution can be controlled. 5. What do you understand by landfills? ​

Answers

Answered by nivedanair1802
3

Answer:Nutrient pollution, caused by excess nitrogen and phosphorus in water or air, is the number-one threat to water quality worldwide and can cause algal blooms, a toxic soup of blue-green algae that can be harmful to people and wildlife.

Explanation:

Answered by yatripatel15
1

Answer:

1. How do people living near rivers pollute water?

Answer:- People living near rivers pollute water by throwing garbage and other disposable items in it. Explanation: All the garbage and sewage water drained into the rivers without caring about the purity of the rivers. People are usually careless while throwing wastes such as bottles and plastics directly into rivers.

2. Write two ill-effects of water pollution.

Answer:- Entry of the pollutants into waterways or large water bodies creates acidic lakes, raises the temperature of water bodies, promote the spread of algae blooms, and lead to dissolved oxygen depletion. This can force fish and other aquatic animals out of their locations in search of more adaptable water areas.

3. What is biodegradable waste?

Answer:- Biodegradable waste includes any organic matter in waste which can be broken down into carbon dioxide, water, methane or simple organic molecules by micro-organisms and other living things by composting, aerobic digestion, anaerobic digestion or similar processes.

4. Write two ways by which air pollution can be controlled.

Answer:- 8 Best Ways to Reduce Air Pollution

  1. Using public transports.
  2. Turn off the lights when not in use.
  3. Recycle and Reuse.
  4. No to plastic bags.
  5. Reduction of forest fires and smoking.
  6. Use of fans instead of Air Conditioner.
  7. Use filters for chimneys.
  8. Avoid usage of crackers.

5. What do you understand by landfills?

Answer:- A landfill is a place where waste is kept. Waste is usually buried in landfills, but it may first be sorted to remove any recyclable materials. ... Once the waste is crushed into very small pieces, it is buried, but without oxygen, a dangerous gas called methane is created.

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