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scientists first talked about ozone depletion. Different hypotheses, which had attributed the ozone gap to variations in solar UV radiation or to adjustments in atmospheric circulation patterns, had been also tested and proven to be untenable. seventy eight After a collection of scientific expeditions to the Antarctic produced convincing evidence that the ozone hole was indeed attributable to chlorine and bromine from manmade organohalogens, the Montreal Protocol was strengthened at a 1990 assembly in London.

Studies have found that when vegetation are exposed to UVB radiation much like stratospheric

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