|
It may or may not be warming. We really cannot tell because we have not been measuring it long enough to know. It's like measuring your breathing during that brief instant between breaths - and then claiming that you've stopped breathing.
The earth's climate runs in long cycles (analogous to breathing) of warm/cold/warm/cold. We are certainly in a warm period, but where in that period we do not know. We could be approaching the peak, but if so, we won't pause there, but immediately start to cool again. Ten thousand years from now, where I'm standing might be under a mile of ice.
What causes this cycle? Like evreything else, I'd bet there are lots of contributing factors. The tilt of the earth, our distance from the sun, the output of the sun, the fluctuation of the earth's magnetic field (allowing more or less radiation in), the amount of algae in the oceans, the amount of vegetation on earth, volcanic activity...the list goes on. Any (or more likely all) of them may have an impact. If two or three heat their peak at the same time, things get warmer.
Humans might kill themselves off with their own garbage and waste -- but it doesn't have anything to do with global climate.
|