1) Certain atmospheric gases like carbon dioxide, methane, and nitrous oxide trap heat from the sun in the lower atmosphere, causing the greenhouse effect. Without this effect, the average temperature on Earth would be around 60°F colder. 2) Possible causes of global warming include increased greenhouse gases from human activities like burning fossil fuels, deforestation, agriculture, and population growth. 3) Consequences of global warming include climate change, rising sea levels, more extreme weather, species extinction, and ocean acidification.

1. Greenhouse Effect and Global Warming

7. Process of the Greenhouse Effect

11. A Better Look... http://earthguide.ucsd.edu/earthguide/diagrams/greenhouse/