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प्रश्न
What is air pollution?
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उत्तर
Air Pollution: “Mixing of UNWANTED and HARMFUL SUBSTANCES in the air is called AIR POLLUTION.”
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संबंधित प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
Atmospheric nitrogen is directly absorbed by the plants to form plant proteins.
Name two important processes supported by oxygen present in air.
Define the following:
Respiration
Name the processes which maintain the balance between oxygen and carbon dioxide in the air. How is it done?
Tick (√) the correct alternative from the choice given for the following statement.
The gases which cause acid rain are
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
What is wind energy?
______ is important for all living creatures.
Air has no ______ & ______.
Which of the following statements is incorrect?
