Here's another way to celebrate Earth Day this week -- take our quiz to test your knowledge of global temperature and its impact on Earth's climate.
› View here
› View here
A Hot Challenge for Earth Day
Jet Propulsion Laboratory https://www.jpl.nasa.gov/ April 20, 2010
Here's another way to celebrate Earth Day this week -- take our quiz to test your knowledge of global temperature and its impact on Earth's climate.
2010-2573