Source 1:Source 2: “We have to slow down the emissions of carbon dioxide. . . . 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 Which statement best synthesizes these passages? Carbon dioxide (CO2) is harmful to the environment. Energy experts give us great ideas for how to become more efficient with our energy use. Energy efficiency is affected by the use of carbon dioxide (CO2). Energy efficiency and the use of renewable energy will lower carbon dioxide (CO2) emissions.