Which of the following is not an air pollutant as given in your text?

Is the air cleaner today or was it cleaner 30 years ago?

Will sweating help cool you down when the humidity is 100%?

What gas makes up the majority of the air we inhale?

What gas makes up the majority of the air we exhale?

Dry air is _________% nitrogen and _________% oxygen.

Why is it important to have ozone in earth’s air?

What would happen to life on the earth if all the greenhouse gases such as carbon dioxide were removed and why?

95% helium, 4% hydrogen, and 1% other.

21% oxygen, 78% nitrogen, and 1% other.

Which of the following is not a region of the homosphere?

If you want to study weather, which region of the atmosphere would you study?

On a cold night, what makes you shiver?

Dry air is 78% oxygen.

Ozone is both a poison gas and critically important to survival of life on earth

A decrease in the amount of carbon dioxide in the atmosphere would increase the Earth’s temperature.

For good health, we should decrease the concentration of ground-level ozone

The average global temperature is increasing at an alarming rate.

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