Combustion reactions release harmful gases into air. These gases

Indicate which of the following is a harmful effect of combustion reactions.

Contamination of air with harmful gases or materials is called

Combustion reactions release harmful gases (air pollutants) into air. Indicate which of the following is not an air pollutant.

Pick out from the following human activities, those that are sources of air pollution.

The increase in the level of air pollutants like sulfur dioxide gas in air results in an environmental problem called:

Global warming results from:

The heat radiated back from earth is trapped by polluting gases like carbon dioxide and warm the air, that increases atmospheric temperature of earth. This phenonmenon is called:

To fight against global warming, one must reduce the level of carbon dioxide gas in air. This can be done through:

To fight against acid rain, one must reduce the level of sulfur and nitrogen oxides in air. Which of the following increases the level of sulfur or nitrogen oxides in air?

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