Homework 3, Astr 305g, Spring 2008.

Global warming and the greenhouse efffect.

a. Describe what the greenhouse effect is, as it works on Earth, so I am not asking about how it works in a greenhouse.
 
b. What are the beneficial effects of the greenhouse effect on Earth that may help make it possible to sustain life on Earth? Contrast the Earth's average temperatures on day and night side with e.g. those on the Moon or Mars.

c. Which planet in the solar system has the most extreme greenhouse effect, which has the minimum greenhouse effect?  Briefly explain why.

d. What is meant with "global warming" on Earth?
    What is meant with "ozone depletion" in the Earth's atmosphere?
    Are global warming and the ozone depletion the same, or different? Are they
    connected?

e. Why are we concerned about global warming?