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the excessive growth of algae in eutrophic streams, rivers and dams.
an enzyme that catalyses (speeds up) the hydrolysis (breaking) of a chemical bond.
rain that contains high levels of sulfuric acid, hydrochloric acid and nitric acid.
energy resources (coal, crude oil and natural gas) derived from the fossilised remains of plants...
a response of the body tissues to injury or irritation. It causes pain, swelling, redness and...