Well guys go to the end of the Roman Empire are take a peek at what historians say the climate was, much warmer by the way. Then the Little Ice Age known also in European history as the Dark Ages. The Little Ice Age came on very fast and if not for developing tubers ( potatoes ect ) the human loss would have been much worse which was a loss of about 1/3 of the population, not counting the disease and everything else.

The climate has been warming again since the end of the Little Ice Age with ups and downs. Tambora & Krakatoa ( volcanoes ) altered the climate for between 5 to 10 years each. ( British Navy Records ) All that said the planets climate changes with the axis tilt that is on a 10000 year flip thing, lunar, and volcanoes ( the one that built Eastern Washington nearly wiped out the planet as did the India one but both were in prehistoric times ) and the atmosphere.

All that said pouring naturally stored carbon into the air and poisoning the oceans and removing vegetation can not help but do something but just what? The same people that started off calling it global warming caused only by human released carbon are the same bunch that in the seventies said another Little Ice Age was close at hand. When that did not pan out they went to climate change and are they right. Yup been going up for the last few centuries but we are not near what it was in the Roman times yet. So if the planets climate has cycles what are our carbon releases doing? Don't know but once before the carbon content built up and the oceans warmed up enough to release the methane trapped on the ocean floor. End result? The global warming ended up freezing the whole planet.

Yup it is snowing in Houston.