Is the gradual increase in the overall temperature of the earth’s atmosphere generally attributed to the greenhouse effect and caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants. greenhouse effect global warming climate change atmospheric heating

5. how is transported soil different from residual soil? o a. it forms on unconsolidated materials. ob. it develops on bedrock. o c. it has been moved from another location. d. it transports other materials.

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.

Read the article about the fraser river, one of the most important rivers in canada. what is the most important species of fish in this river? why are the numbers of these fish declining?