What do all of these data sets agree upon? Chapter 3. How do we know that greenhouse gases lead to warming? When did scientists begin to understand the importance of the role of certain gases in regulating the temperature of the earth? Which gases are considered greenhouse gases? If the concentration of greenhouse gases in the atmosphere decreased, what would happen to global temperatures? Chapter 4. How do we know that humans are causing greenhouse gas concentrations to increase? What human activity has caused CO2 to be released into the atmosphere much more rapidly than via natural processes? Where did Charles David Keeling begin measuring air samples and CO2 concentrations in the atmosphere in the late 1950s to test the hypothesis proposed by other scientists? What do data collected around the world reveal about concentrations of atmospheric CO2 since the late 1950s?
What do all of these data sets agree upon? Chapter 3. How do we know that greenhouse gases lead to warming? When did scientists begin to understand the importance of the role of certain gases in regulating the temperature of the earth? Which gases are considered greenhouse gases? If the concentration of greenhouse gases in the atmosphere decreased, what would happen to global temperatures? Chapter 4. How do we know that humans are causing greenhouse gas concentrations to increase? What human activity has caused CO2 to be released into the atmosphere much more rapidly than via natural processes? Where did Charles David Keeling begin measuring air samples and CO2 concentrations in the atmosphere in the late 1950s to test the hypothesis proposed by other scientists? What do data collected around the world reveal about concentrations of atmospheric CO2 since the late 1950s?