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| Chemistry is the study of the building blocks of matter, the atoms of the elements, and how these combine together to form molecules. The most complex molecules are proteins and nucleic acids, the organic building blocks of Biology. Other atoms combine to form the more regular crystals of the rocks of Geology that are sought by the mineral extraction Industry. Chemicals are processed on a large scale by chemical Engineering to make plastics and fuels. Medicines are synthesised on to improve our Health, additives are important in Food production while fertilisers and pesticides help Agriculture. | ||||||||||||||