YOU HAVE TO WONDER why, since its so easy to see, so many people don't seem to get it, or refuse to accept it. You also have to wonder why universal acceptance didn't take place decades ago, and why every high school chemistry, physics, and biology teacher in america isn't hitting the bricks, knocking on doors, explaining it, one door bell at a time.
It all boils donw to the fact that for a long time now, scientists, or anyone else, has had the wherewithall to take a sample of ordinary air, and measure, precisely, what its made up of. There's nothing too exciting about this, and the reason we don't all go around doing it all the time is, we know the results in advance. We know exactly what air is made up of.
any sample, taken anywhere, yields the same ole twenty percent oxygen, seventy eight percent nitrogen, and two percent trace elements. Over the past few decades, however, is is these trace elements which have created all the controversy, for the percent of carbon has significantly increased, while aall the other trace elements have remained at the same levels.
the carbon increase is almost always there, particularly in big cities. Even in the most remote, pristine parts of the earth there is a discernable increase in carbon. The increase, the amount of carbon there is now that there didn't used to be, is almost exactly equal to the amount that human activity has injected in to the air.
Its been that way for awhile; the carbon increase, the measuring of it, knowledge of where it came from, and also, the precise chemical properties of carbon, in particular, the heat absorption coefficient.We know enough, and have for a very long time, to know that global warming cannot be anything other than "real". Like measuring a house with a yard stick, and knowing how big it is. Just measurements, all measurments. That, and just a smidgen of common, sense, and courage.
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