This preview shows page 1. Sign up to view the full content.
Unformatted text preview: chlorofluorocarbons (CFCs), carbon dioxide, methane, and other gases in the atmosphere, where they act like the glass in a greenhouse, holding heat from the sun close to the earth and preventing the heat from rising back into space. Evidence for the greenhouse effect lies in the increasing temperatures recorded around the world. Heat and drought caused by the greenhouse effect has at least three negative consequences: 1) it threatens crops and food supplies; 2) it accelerates the extinction of numerous plant and animal species; and 3) it threatens to melt polar ice caps and other glaciers, resulting in a rise in sea level (and the flooding of many countries, such as Egypt and Bangladesh)....
View Full Document
- Fall '10