Read the two passages. We have to slow down the emissions of carbon dioxide and methane from coal bur[n]ing, oil and eventually natural gas. . . . And the best ways to do that are energy efficiency and a switch to renewables. –Ramez Naam, Quoted in "The Trillion Dollar Crisis Facing the U.S.,” Bernice Napach First and foremost, energy efficiency is a major lever for reducing CO2 emissions along all parts of the energy chain—from the production of resources all the way to final consumption. –"To Beat Climate Change, Digitalize the Electrical World," Joe Kaeser What idea about carbon dioxide emissions do both passages support? The creation of carbon dioxide is mainly caused by burning coal and oil. Energy efficiency is a good way to reduce the creation of carbon dioxide. Switching to renewable energy will reduce the amount of carbon dioxide created. Energy efficiency needs to occur at all stages of the energy chain.