The coral reefs have largely bleached out, the oceans are too warm, too polluted ...large predator fish stocks are down about 90%....
Melting ice on Greenland is slamming into the Labrador current, altering salinity and temperature-the Gulf Stream is slowing (about 1/3 already), and may stop sometime this century, plunging the entire northern hemisphere into a deep freeze. Senior Pentagon officials think climate change is more of a threat to national security than any 'terrorism'....(Our nation could succumb to morbid obesity in less than three generations, but that's another story) .
Global warming could have natural causes ...The Earth periodically goes through warming and cooling cycles- the Earths core could be heating up, or the Sun could be burning extra hot gases towards us... Cosmic rays might influence weather too (they help drive evolution by re-arranging DNA) . But man has to be having some impact upon the climate, even if its minor. We are causing thousands of necessary species to go extinct, we our fouling the air and water beyond healthy limits, the oceans might already be mortally wounded... The surface of the land is ravaged and barren ....We have too many people, too little proper planning, too few good people, or some combination of the three.....