How have human activities affected atmosphericgreenhouse gas levels during the last 275
Chapter 19, Problem 4(choose chapter or problem)
How have human activities affected atmosphericgreenhouse gas levels during the last 275 years and especiallyin the last 30 years? List the major human activitiesthat add CO2, CH4, and N2O to the atmosphere.What is a carbon footprint? How do scientists usemodels to make projections about future temperaturechanges? What do climate models project about temperaturechanges during this century? Explain howeach of the following might contribute to atmosphericwarming and climate change: (a) solar energy changes,(b) the oceans, (c) cloud cover, and (d) air pollution.
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