What is the main suspected environmental problem associated with the burning of fossil fuels?

that would be global warmingWhat is the main suspected environmental problem associated with the burning of fossil fuels?The generation of carbon dioxide and the degeneration of the ozone layer that protects the earth and its inhabitants from harmful UV rays from the sun.What is the main suspected environmental problem associated with the burning of fossil fuels?The official answer for homework is the CO2 greenhouse effect, but the ocean acidification effect may turn out to be even more important.