Environmental Science 14th Edition by Tyler Miller ,Scott Spoolman

Exercise 10

What is the key concept for this section Describe the warming and cooling of the atmosphere that has occurred over the past 900,000 years and during the last century. How do scientists get information about past temperatures and climates What is the greenhouse effect and why is it so important to life on the earth List the four conclusions of the IPCC in 2007 regarding global temperature changes during the last half of the past century and about projected temperature changes during this century. What are five pieces of evidence that support these conclusions