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Introduction Background Information Acid rain causes damage to limestone bulidings. Scientists are concerned that increased air pollution may cause an increase in the concentration of acid in the rain. If this is the case then it would increase the damage done to limestone bulidings. Acid rain is caused when we burn fuels. When we burn these fuels we make a gas called sulphur dioxide. This gas goes into the air. The sulphur dioxide reacts with the oxygen and then dissolves inot droplets of rain. This then makes an acid called sulphuric acid. Eventually, the acidic droplets in the clouds fall as rain. When acid reacts with limestone the acid eats away at the limestone. e.g limestone statues loose their features becasue of the acid eating away at them. Carbon + Oxygen Carbon dioxide atom molecule molecule Sulphur + Oxygen Sulphur dioxide atom molecule molecule The question I want to find the answer to is 'What causes acid...

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