10. sulfur dioxide emitted from power plants eventually causes acid rain in the atmosphere. which term best describes acid rain? explain.

a. secondary pollutant
b. primary and secondary pollutant
c. primary pollutant
d. greenhouse gas

A primary pollutant is an air pollutant emitted directly from a source.

A secondary pollutant is not directly emitted as such, but forms when other pollutants (primary pollutants) react in the atmosphere.

Examples of a secondary pollutant include ozone, which is formed when hydrocarbons (HC) and nitrogen oxides (NOx) combine in the presence of sunlight; NO2, which is formed as NO combines with oxygen in the air; and acid rain, which is formed when sulfur dioxide or nitrogen oxides react with water.

Hope this helps:)

b.

developed countries have tended to improve the environment, while developing countries have tended to damage it.