C. Answer the following questions.
1. Name three gases that are present in the air.
2. List two causes of air pollution.
3. List three ways in which we can check air pollution.
4. What do animals need water for?
5. How do rivers get polluted?
6. What is meant by rainwater harvesting?
Answers
Answer:
1 Nitrogen, oxygen and carbon dioxide
2 i Smoke from factories
ii harmful emissions from vehicles
5 Rivers get polluted due to unclean waste water put into the river from factories , throwing waste into the river and due to farmers use them to bathe their animals.
Answer:
Explanation:
1.nitrogen,oxygen and carbon dioxide
2.burning of fossil fuels and wildfires
3. Find Out How Bad – or Good – Your Air Is Right Now
. Get the Day’s “Report Card” on the Overall Air Quality of Your Area
. Track Wildfires that May Affect Air Quality (As Well as Road Closures)
4.Animals need fresh water for their bodies to function. They gain water not only through the action of drinking but also from the food they eat. Water is vital for bodily functions such as regulation of temperature, nutrient uptake, removing wastes, body weight, and health.
5.Dirty water containing chemicals is put back in the river. Water used for cooling is warmer than the river itself, and this is also a form of pollution. People are sometimes careless and throw rubbish such as bottles and crisp packets directly into rivers. Pollution kills water plants and animals.
6.Rain water harvesting is a technique of collection and storage of rain water in surface (storage tanks) or sub surface aquifer before it is lost as surface runoff.