Why is carbon dioxide called a greenhouse gas? choose one: a. it intensifies solar radiation as it passes through earth's atmosphere. b. it moderates solar radiation by allowing some to pass and reflecting the rest. c. it absorbs solar radiation and releases it to the earth as thermal radiation. d. it allows solar radiation to reach earth but absorbs and traps the infrared radiation re-radiated by earth.

Match the vocabulary word with its meaning

Which of the following is not a challenge to instituting sound global environmental policies? a. most changes are inexpensive and easy to implement. b. elected leaders who support unpopular environmental issues often are not re-elected. c. economic considerations outweigh environmental ones in many societies. d. there is no way to enforce international environmental agreements.

Paraguay is one of the only two countries in the americas that don't have a coastal border. the country is slightly smaller than california. it was under a military dictatorship for 35 years, ending in 1989; today it is a constitutional republic. most of the population is roman catholic, and over 60% of the people live in cities. its environment is threatened by deforestation and water pollution. which of the following facts from the paragraph above best describes an element of paraguay's culture? (apex)