Answer the following
A. Give are examples of each of water, soil and air pollution from your residential area.
B. How does the pollution occur due to vehicles ? Give the names of vehicles causing least pollution.
C. What are natural reasons for water pollution.
D. Suggest four preventive measures for air pollution.
E. Explain relation between green house effect and global warming.
F. Construct two slogans each on air, water and soil pollution.
Answer the following
A. Give are examples of each of water, soil and air pollution from your residential area.
B. How does the pollution occur due to vehicles ? Give the names of vehicles causing least pollution.
C. What are natural reasons for water pollution.
D. Suggest four preventive measures for air pollution.
E. Explain relation between green house effect and global warming.
F. Construct two slogans each on air, water and soil pollution.
A . a. Sources of air pollution:
Burning of fuel like wood, kerosene.
Vehicular emissions from automobiles.
b.Sources of water pollution:
Washing of clothes in flowing water bodies.
Release of domestic sewage into water bodies.
c.Sources of soil pollution:
Spraying of pesticides and insecticides on plants.
Mixing of wastes of animals and plants.
B. Most of the vehicles are run on fossil fuels like petrol and diesel. These fossil fuels are burnt in vehicles to produce energy which results in the production of smoke. This smoke contains harmful gases like carbon monoxide, hydrogen, nitrogen oxide, particulate matter, ammonia and Sulphur dioxide. There are various other kinds of vehicles which cause least or no pollution at all, for example. bicycle, vehicles run on CNG, electric cars, metro etc.
C. The natural reasons of water pollution are :
- Presence of aquatic weeds which depletes the oxygen content of water bodies.
- Excessive algal growth.
- Mud and sludge which are added to water bodies due to river currents and their diversions.
- Growth of microbes like bacteria and fungi on dead and decaying matter present in water bodies.
D. Some of the measures that can be taken to prevent air pollution are as follows:
(i) Use of clean fuels such as CNG, LPG and unleaded petrol in public and private transport.
(ii) Use of renewable sources of energy such as solar, wind, and hydel energy.
(iii) Planting more and more trees to prevent pollution.
(iv) Preventing burning of dry leaves and using them in composting.
E. Greenhouse gases such as CO2, methane, etc. are gases that absorb the heat of the Sun and the Earth and emit it back to the Earth’s surface. Thus, these gases prevent a part of the heat rays from escaping into the atmosphere. This cycle is repeated several times to maintain the Earth’s temperature to an optimum temperature of 15°C. Therefore, upto a normal level, greenhouse gases help in maintaining the temperature on the Earth.
However, the concentration of these gases has increased because of increased industrialization, which has lead to the heating up of the Earth’s surface. As a result, the overall temperature of the Earth has increased, resulting in climatic changes. During the last century, the temperature of the Earth has increased by 0.6°C. This has lead to global warming.
The greenhouse effect can be controlled by reducing the use of fossil fuels. Fossil fuels produce greenhouse gases on burning.
F. The slogan for air pollution are:
1) Polluting air seems to be unfair as it will make you to lay on bed
2) Care for your surrounding air because it will help you to breathe safe and clean air.
The slogan for soil pollution is:
1) If you spoil the soil where will you cultivate.
2) Do not be much selfish gather your hands to save our land.
The slogan for water pollution is:
1) Never contaminate drinking water as it is the prime source of organism.
2)Water is life ,let it be.
A . a. Sources of air pollution:
Burning of fuel like wood, kerosene.
Vehicular emissions from automobiles.
b.Sources of water pollution:
Washing of clothes in flowing water bodies.
Release of domestic sewage into water bodies.
c.Sources of soil pollution:
Spraying of pesticides and insecticides on plants.
Mixing of wastes of animals and plants.
B. Most of the vehicles are run on fossil fuels like petrol and diesel. These fossil fuels are burnt in vehicles to produce energy which results in the production of smoke. This smoke contains harmful gases like carbon monoxide, hydrogen, nitrogen oxide, particulate matter, ammonia and Sulphur dioxide. There are various other kinds of vehicles which cause least or no pollution at all, for example. bicycle, vehicles run on CNG, electric cars, metro etc.
C. The natural reasons of water pollution are :
- Presence of aquatic weeds which depletes the oxygen content of water bodies.
- Excessive algal growth.
- Mud and sludge which are added to water bodies due to river currents and their diversions.
- Growth of microbes like bacteria and fungi on dead and decaying matter present in water bodies.
D. Some of the measures that can be taken to prevent air pollution are as follows:
(i) Use of clean fuels such as CNG, LPG and unleaded petrol in public and private transport.
(ii) Use of renewable sources of energy such as solar, wind, and hydel energy.
(iii) Planting more and more trees to prevent pollution.
(iv) Preventing burning of dry leaves and using them in composting.
E. Greenhouse gases such as CO2, methane, etc. are gases that absorb the heat of the Sun and the Earth and emit it back to the Earth’s surface. Thus, these gases prevent a part of the heat rays from escaping into the atmosphere. This cycle is repeated several times to maintain the Earth’s temperature to an optimum temperature of 15°C. Therefore, upto a normal level, greenhouse gases help in maintaining the temperature on the Earth.
However, the concentration of these gases has increased because of increased industrialization, which has lead to the heating up of the Earth’s surface. As a result, the overall temperature of the Earth has increased, resulting in climatic changes. During the last century, the temperature of the Earth has increased by 0.6°C. This has lead to global warming.
The greenhouse effect can be controlled by reducing the use of fossil fuels. Fossil fuels produce greenhouse gases on burning.
F. The slogan for air pollution are:
1) Polluting air seems to be unfair as it will make you to lay on bed
2) Care for your surrounding air because it will help you to breathe safe and clean air.
The slogan for soil pollution is:
1) If you spoil the soil where will you cultivate.
2) Do not be much selfish gather your hands to save our land.
The slogan for water pollution is:
1) Never contaminate drinking water as it is the prime source of organism.
2)Water is life ,let it be.
