Students registered for the Chemistry English Foundation 1 are requested to attend a seminar on how ot create your own blog in the computer room on Wednesday, October 1 at 500.
Ozone depletion It describes two distinct, but related observations: a slow, steady decline of about 4% per decade in the total volume of ozone in Earth's stratosphere (ozone layer) since the late 1970s, and a much larger, but seasonal, decrease in stratospheric ozone over Earth's polar regions during the same period. The latter phenomenon is commonly referred to as the ozone hole.
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