Today, we will try to find out the answers to these questions: Q.1. What are the different ways in which water gets contaminated? Q.2. : At an individual level, how can you help to reduce air pollution? Q.3. Clear, transparent water is always fit for drinking. Comment. Q.4. You are a member of the municipal body of your town. Make a list of measures that would help your town to ensure the supply of clean water to all its residents. Q.5. Explain the differences between pure air and polluted air. Q.6. Explain circumstances leading to acid rain. How does acid rain affect us? Q.7. Which of the following is not a greenhouse gas? (a) Carbon dioxide (b) Sulphur dioxide (c) Methane (d) Nitrogen Q.8. Describe the ‘Green House Effect’ in your own words. Q.9. Prepare a brief speech on global warming. Q.10. Describe the threat to the beauty of the Taj Mahal. Q.11. Why does the increased level of nutrients in the water affect the survival of aquatic organisms? Important questions : Q.1. What are the 3Rs of water conservation? Q.2. The level of air pollution is higher at busy traffic intersections. Why? Q.3. What do CFCs stand for? Name some devices where CFCs are used. Why CFCs are considered as pollutants? Q.4. A gas X is present in the stratosphere that prevents ultraviolet radiations of the sun from reaching the earth. Name the gas. Q.5. Combustion of fossil fuels generates a lot of air pollution. Name two alternative sources of energy which do not cause any pollution. Q.6. Burning dry leaves causes air pollution. What should be done to dispose off the dry leaves? Q.7. Hot water can also be a pollutant. Explain how? Q.8. Name any two sources which cause air pollution due to Suspended Particulate Matter (SPM). Q.9. What is ozone layer? What will happen if the ozone cover of the atmosphere is removed? Q.10:- Why we should plant trees and nurture the ones already present in the neighborhood? Q. 11 :- Write short note on Ganga Action plan. Also list some reasons for pollution in the river Ganga. Q.12 :- What is meant by chlorination? Q.13:- What are the traditional ways of purifying water to make it fit for drinking? Q.14:- Name the types of water pollutants. Q.15:- Which are the various sources that pollute water? Q.16:- Is smog an air pollutant? Q.17 :- The use of excessive fertilizers and pesticides leads to the deficiency of an important substance in water. Name the substance. Q.18:- Trees help in reducing pollution of our environment. A large number of trees are planted by the people in the month of July every year. This occasion is called? Q.19:- It is said ,”CO2 contributes to global warming.” Explain. Q.20:- Air is a mixture of various gases. One of the gas is 21% part of the air and is essential for the survival of human beings. This gas is called? Q.21:- Which of the following is not a source of air pollution? i)Automobile exhaust ii) Windmill iii) Burning of firewood iv)Powerplant Q.22 :- Ramesh wishes to contribute in reducing air pollution. Which vehicle should he use for going to school? a)Car b) Autorickshaw c) School Bus d) Scooter Q. 23. We can survive for sometime without air but we cannot survive even for a few minutes without food? Comment. Q.24:- Carbon monoxide is produced by the complete burning of fuels such as coal, petrol, diesel. Comment. Q.25:- The type of pollution which is likely to affect Taj Mahal in Agra to a greater extent is :- a) Air pollution b) Water pollution c) soil pollution d) noise pollution Q.26:- The Kyoto protocol is associated with?

Q.1. What are the different ways in which water gets contaminated? Q.2. : At an individual level, how can you help to reduce air pollution? Q.3. Clear, transparent water is always fit for drinking. Comment. Q.4. You are a member of the municipal body of your town. Make a list of measures that would help your town to ensure the supply of clean water to all its residents. Q.5. Explain the differences between pure air and polluted air. Q.6. Explain circumstances leading to acid rain. How does acid rain affect us? Q.7. Which of the following is not a greenhouse gas? (a) Carbon dioxide (b) Sulphur dioxide (c) Methane (d) Nitrogen Q.8. Describe the ‘Green House Effect’ in your own words. Q.9. Prepare a brief speech on global warming. Q.10. Describe the threat to the beauty of the Taj Mahal. Q.11. Why does the increased level of nutrients in the water affect the survival of aquatic organisms?

Q.1. What are the 3Rs of water conservation? Q.2. The level of air pollution is higher at busy traffic intersections. Why? Q.3. What do CFCs stand for? Name some devices where CFCs are used. Why CFCs are considered as pollutants? Q.4. A gas X is present in the stratosphere that prevents ultraviolet radiations of the sun from reaching the earth. Name the gas. Q.5. Combustion of fossil fuels generates a lot of air pollution. Name two alternative sources of energy which do not cause any pollution. Q.6. Burning dry leaves causes air pollution. What should be done to dispose off the dry leaves? Q.7. Hot water can also be a pollutant. Explain how? Q.8. Name any two sources which cause air pollution due to Suspended Particulate Matter (SPM).

Q.9. What is ozone layer? What will happen if the ozone cover of the atmosphere is removed? Q.10:- Why we should plant trees and nurture the ones already present in the neighbourhood? Q. 11 :- Write short note on Ganga Action plan. Also list some reasons for pollution in the river Ganga. Q.12 :- What is meant by chlorination? Q.13:- What are the traditional ways of purifying water to make it fit for drinking? Q.14:- Name the types of water pollutants. Q.15:- Which are the various sources that pollute water?

Q.16:- Is smog an air pollutant? Q.17 :- The use of excessive fertilizers and pesticides leads to the deficiency of an important substance in water. Name the substance. Q.18:- Trees help in reducing pollution of our environment. A large number of trees are planted by the people in the month of July every year. This occasion is called? Q.19:- It is said ,”CO2 contributes to global warming.” Explain. Q.20:- Air is a mixture of various gases. One of the gas is 21% part of the air and is essential for the survival of human beings. This gas is called? Q.21:- Which of the following is not a source of air pollution? i)Automobile exhaust ii) Windmill iii) Burning of firewood iv)Powerplant Q.22 :- Ramesh wishes to contribute in reducing air pollution. Which vehicle should he use for going to school? a)Car b) Autorickshaw c) School Bus d) Scooter Q. 23. We can survive for sometime without air but we cannot survive even for a few minutes without food? Comment. Q.24:- Carbon monoxide is produced by the complete burning of fuels such as coal, petrol, diesel. Comment. Q.25:- The type of pollution which is likely to affect Taj Mahal in Agra to a greater extent is :- a) Air pollution b) Water pollution c) soil pollution d) noise pollution Q.26:- The Kyoto protocol is associated with?