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Seaweeds
Coal
Petroleum
Marsh gas
Particulates (< 1 µm size) remaining suspended in air indefinitely transported by wind currents are called
Pasteurisation is the process in which milk is heated to
Patients with sickle cell anemia are homozygous for
Pedology is the study of
People die in an atmosphere of carbon dioxide because
Percentage of carbon in steel ranges from
Percentage of lead in lead pencils is
Peroxyacetyl nitrate is a
Person Who among the following is colourblind cannot distinguish between
Pesticides are used to destroy