It isn't real ..its the gov's way of explaining away he weather and earth changes and a way to put yet another tax on folk....
The real culprit is the sun being affected by the galactic centre boundary crossing.... as it does every 10 to 15 thousand years or so give or take...

Get ready for the real global warming when the sun novas and pelts the planet with silicone micro beads and huge chunks of its shell as our shield drops and we are microwaved and radiated to death by cosmic rays and the Van Allen belts de polarise and fall to earth frying anything bigger than an ant...and thats only the first few hours of the event....im not mentioning what will happen to the nuke plants around the world either but i bet you guys can guess????