I am surprised anyone needs "climate" explained. the age of the earth, the millions of years of climate evolution should be enough for any sane person with a modicum of common sense to understand that as humans we have no control of the climate changes. the things that change the climate can not be affected by the minuscule affect we humans have on the earth. Asteroids, mega sun spots can affect climate as well as volcanic activity when large eruptions take place.
We can effectively change pollution in the US and surrounding waters, but unless we get "ALL" countries to abide by cleaner waste....it is a waste of time to consider global pollution.
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