During digestion, cows produce methane gas, a carbon-containing compound. the methane gets released into the atmosphere. how might this process affect the global environment? a. methane eats ozone, which accelerates the growth of the ozone hole. b. methane removes carbon from the atmosphere, which may eliminate global warming. c. the methane kills bacteria that are essential for the recycling of nutrients into the soil. d. methane adds carbon to the atmosphere, which may promote global warming.