Q. The pollutant responsible for ozone holes is -
1) CO2
2) SO2
3) CO
4) CFC
Q. One of the best solutions to get rid of non-biodegradable wastes is -
1) burning
2) dumping
3) burying
4) recycling
Q. Animal dung is -------------- waste.
1) Biodegradable
2) Non-biodegradable
3) Hazardous
4) Toxic
Q. Which of the following is biodegradable?
1) Iron nails
2) Plastic mugs
3) Leather belts
4) Silver foil
Q. Which of the following is non-biodegradable?
1) Animal bones
2) Nylon
3) Tea leaves
4) Wool
Q. Name one waste which may pollute the earth to dangerous levels of toxicity, if not handled properly.
1) DDT
2) CFC
3) Radioactive substances
4) PAN
Q. In a lake polluted with pesticides, which one of the following will contain the maximum amount of pesticides?
1) Small fish
2) Microscopic animals
3) Big fish
4) Water birds
Q. Name the substance whose accumulation in pelicans of Lake Michigan led to the formation of thin shells of their eggs -
1) CFC
2) PAN
3) DDT
4) PAC
Q. Air pollution causes -
1) global warming
2) floods
3) add rain
4) All of the above
Q. Deforestation is one of the sources of pollution because -
1) it increases the oxygen levels produced
2) it decreases the Carbon dioxide
3) it causes fertilizers to wash away in the water
4) it decreases atmospheric power to absorb carbon dioxide
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