Stone buildings, marble statues, limestone bedrock: these are all chemically eroded by the interaction of with the calcium carbonate that is found in these substances. a) ozone b) cfc's c) acid rain d) carbon dioxide

Stone buildings, marble statues, limestone bedrock: these are all chemically eroded by the interaction of acid rain with the calcium carbonate that is found in these substances. 
Building blocks of limestone or marble exposed to rain and atmospheric gases may show solution effects of chemical weathering. Chemical weathering, is the decomposition of rock from exposure to water and atmospheric gases (principally carbon dioxide, oxygen, and water vapor). As rock is decomposed by these agents, new chemical compounds form.