Living in the Environment 18th Edition by Tyler Miller,Scott Spoolman

تمرين 20

How have human activities affected atmospheric greenhouse gas levels during the last 275 years and especially in the last 30 years List the major human activities that add CO 2 , CH 4 , and N 2 O to the atmosphere. How do scientists use models to make projections about future temperature changes What do a number of climate models project about temperature changes during this century Explain how each of the following might contribute to projected atmospheric warming and resulting global climate disruption: (a) a hotter sun, (b) the oceans, (c) cloud cover, and (d) air pollution.