The majority of the world's energy is produced by burning fossil fuels. fossil fuel combustion results in the release of carbon dioxide and other greenhouse gases into the atmosphere. which of the following is the most likely risk of using fossil fuels as an energy source? a. when large amounts of carbon dioxide enter the atmosphere, the gas accumulates in toxic amounts in the human body. b. the release of large amounts of greenhouse gases can change earth's climate. c. adding greenhouse gases to the atmosphere plants perform photosynthesis more efficiently. d. greenhouse gases cause the ozone in the stratosphere to break down, leaving earth vulnerable to uv radiation.