Which of the following destroys ozone molecules leading to more harmful ultraviolet (uv) rays reaching earth's surface?
a. cfcs
b. carbon dioxide
c. acid rain
d. smog

Which of the following best describes brazil's economy from 1650-1880? a. it gradually shifted to manufacturing as the industrial revolution progressed. b. it was based on mining. c. it was based on plantation agriculture, where slaves served as a labor force. d. it was based on small, family-owned farms.

The biome that includes evergreen trees is the forest biome.

Southeast asia relies on its many because of the volcanic, mountainous terrain. a. highways c. rivers b. airports d. lakes