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1. Fossil fuels such as coal are found inside the earth's crust. They are created over millions of years by natural processes such as the decomposition of buried dead animals.
2. Sulphur dioxide causes problems. It also dissolves in rainwater, causing rain, and causes damage to plants, buildings, monuments, and metal structures.
3. are found deep inside the earth's crust, which are energy-rich substances created over millions of years by natural processes such as the anaerobic decomposition of buried dead animals.
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