Pathogens are disease causing microorganisms.
They can be spread in many ways; by direct contact, by water or by air. Different pathogens are spread by different mechanisms.
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Learn the basics about the polymerisation of ethene as a part of organic chemistry.
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This video is part of 'Chemistry for All' - a
Learn the basics about the atom economy principle of Green Chemistry, as a part of environmental chemistry.
A reaction with a high atom economy is one where all of the atoms in the reactants are included in the final, desired product. Such a reaction would have little, if any, waste produced.
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