text: D - because carbon dioxide is a "greenhouse" gas. it traps heat.\n\nWhy not the other ones:\nA - I thought the oxygen may decrease, because where is the dioxide coming from if not O2? but then i realized there is plenty of oxygen floating around in different froms, like anything wet. burn the wet stuff and the oxygen gets released (along with hydrogen).\n\nB - CO2 doesn't affect the amount of visible light reflected.\n\nC - CO2 doesn't intefere with the ozone