Question

what is pollution 4th class​

Answer 1

Answer:

*pollution*:-Pollution is the introduction of harmful materials into the environment. ... Pollutants can be natural, such as volcanic ash. They can also be created by human activity, such as trash or runoff produced by factories. Pollutants damage the quality of air, water, and land.

Explanation:

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Answer 2

Required Answer:-

Pollution is any harmful changes in the environment due to human activities such as gases, smoke, dirty water etc.

• There are many types of pollution : Air pollution, water pollution, noise pollution, sand pollution etc.
• The main causes of pollutions are industries, factories etc.
• We need to control our activities which harms our environment to save our environment.
• We should plant many trees to prevent pollution in our environment.