Notes, Exercises, Videos, Tests and Things to Remember on Air and Water Pollution
Please scroll down to get to the study materials.
An undesirable change in the physical, chemical or biological characteristics of air is called pollution. The substances which pollute the air called pollutants.
Different gasses, dust, smoke, disposed of wastes and garbage, etc. are pollutants. These substances make the pollution in the air and the air mixed with these substances is called polluted water. Air pollution may be caused by natural process or by human activities.
Some of the natural processes which cause air pollution areGases and particulate matter released along with lava from the volcanic eruption, the dust raised from the ground during strong winds and storms, smoke from forest fires and fog. The finely divided solid or liquid particles suspended in the air called particulate matter i.e. dust, smoke, fumes. Apart from these, decomposition of plant and animal remains and pollen grains also cause air pollution.
Degradation in the quality of water is called water pollution. Water covers over the 3/4th part of the Earth’s surface. It is one of the very important resources for people and the environment. Water pollution affects drinking water, rivers, lakes and oceans all over the world. In many developing countries, it is usually a leading cause of death, as people use impure water for drinking. Drainage and wastage from industries, laboratory, hospitals, and homes are the main factors that cause water pollution.
There are various causes of water pollution. Main causes of water pollution are described below:
The degradation in the original quality of air due to the mixing of different pollutants is known as air pollution.
Air is polluted by the following ways:
Its effect on living beings are as follows:
Air pollution may cause acid rain which is harmful to all the living beings living in the environment and may severely affect different aspects of nature. Similarly, the acid rain will deteriorate the cultural heritages like temples, gumbas, monuments, etc. by washing away their color, style and so on.
Vehicles operate by the burning of fossil fuels like petroleum which produces smoke and mix with air causing air pollution.
The major cause of air pollution is the human activities. All the needs of humans are the prime cause of air pollution which they are utilizing for their sophisticated life. So, people themselves are responsible for air pollution.
Air pollution has many negative effects upon the human life as well as upon the natural environment. So, it is essential to stop works that cause air pollution to preserve the environment and reduce the effects upon the human life.
Village women use firewood for cooking food which produces smoke in large amount. So, women of the village usually suffer from diseases of respiratory system.
Regular, fast running and big vehicles decrease air pollution because it reduces the number of small vehicles which produces smoke and decreases the level of air pollution. Regular and fast running vehicles decreases the load upon fossil fuel and decrease air pollution.
Two effects causes by human activities are as below:
Environment degradation contribution for the population of a number of poisonous gas in the atmosphere like carbon monoxide, Nitrogen oxides, sulphur dioxide, methane etc. which pollutes the environment.
Acid rain is formed when carbon dioxide (CO2) and Nitrogen dioxide (NO2) react with ______.
Smog is formed when the smoke coming out of vehicle and industries mix with the ______.
Which is the cause of pollution?
all of the above
An undesirable change in the ______characteristics of air is called pollution.
all of the answers are correct.
Rust is formed when iron reacts with ______ in the presence of water.
Incomplete burning of petrol or diesel in vehicles creates ______ gas which is very poisonous.
Combustion of coal in power plant produces mainly ______ which is a major pollutant of air.
Which gas is responsible for depletion of the ozone layer around the earth which protects us from harmful?