Test: AP Environmental Science

1.

Which of the following would be best defined as a secondary pollutant?

Ash and various other gases and organic particles that were released directly into the atmosphere from the Mount St. Helens eruption

Ozone that is formed in the atmosphere when hydrocarbons and nitrogen oxides interact and form a new molecule when exposed to sunlight

Chemical fertilizers provide a needed source of nitrogen for growing crops, but one of the consequences is that some of the nitrogen is released into the atmosphere as nitrous oxide

Sulfur dioxide that is released into the atmosphere from burning coal that has high sulfur content

Carbon monoxide is released into the atmosphere by automobiles from burning fossil fuels

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