Question

7 multiple choice 2 points
many scientists believe that the \greenhouse effect\ is the result of
o overgrazing on land in developing nations
o using large amounts of gasoline, oil, and coal in developed nations
o testing nuclear weapons in violation of the nuclear test ban treaty
o using natural fertilizers to increase crop production

8 multiple choice 2 points
a major factor contributing to the destruction of the amazon rain forests is the
o movement of people from rural to urban areas
o attempt of native peoples to end illegal drug traffic
o need for more farmland
o spread of christianity

Explanation:

• Question 7: The greenhouse effect is mainly caused by the release of greenhouse gases like carbon dioxide. Burning large amounts of gasoline, oil, and coal (fossil fuels) in developed nations releases significant amounts of carbon dioxide. Overgrazing mainly affects soil quality and local ecosystems. Nuclear weapon testing is related to radioactive pollution. Natural fertilizers do not directly cause the greenhouse effect on a large - scale like fossil fuel burning.
• Question 8: The destruction of the Amazon rainforests is largely due to the need for more farmland (for activities like cattle ranching and large - scale agriculture). The movement of people from rural to urban areas does not directly destroy the rainforest. The attempt of native peoples to end illegal drug traffic is not a major cause of rainforest destruction. The spread of Christianity is not a significant factor in the destruction of the Amazon rainforest.

Answer:

1. using large amounts of gasoline, oil, and coal in developed nations
2. need for more farmland