Air pollutants released directly into the air are called

Air pollutants formed as a result of chemical reactions in the atmosphere are called

Which of the following combine to form smog?

Which of the following was the original cause for smog?

How would smog be classified?

What government act reduced smog from Coal burning plants in the United States?

Which of the following is mostly responsible for photochemical smog?

Which of the following contribute to the formation of photochemical smog?

How is photochemical smog classified?

What molecule is produced when nitrous oxides and VOC's react under sunlight?

How many oxygen atoms are in one ozone molecule?

When is ozone bad for human health?

When does ozone in the troposphere cause the most problems?

How does ozone in the troposphere (ground level ozone) damage plants?

How can we reduce ground level ozone?

When is ozone good for human health?

How does ozone in the stratosphere help humans?

Which of the following is not blocked that well by ozone in the stratosphere?

Which of the following molecules has been determined to contribute the hole in the ozone layer?

What impact does the hole in the ozone have on Earth?

Which of the following lead to the reduction of chlorofluorocabons (CFCs)?