The average polar bear family used to have steady fishing work with affordable real estate within reach. Now they have to travel long distances on slow unreliable routes, dodging bullets and dog-eat-dog rat-race. They're right , something's wrong and it's fossil fuel, melting the methane and mammoths.

Tom Harris and Tim Ball assert:

"The IPCC has been wrong in every prediction since 1990. It would be a grave error to use their latest forecasts as the excuse to engage in geo-engineering experiments with the only planet we have."

FACT CHECK: The IPCC did not mention a "man-made volcanic eruption" experiment. If you follow the link Tom and Tim provide for the NBC News article, it is clear that NBC NEWS is referring to others who have hypothesized about it.

Tim Ball and Tom Harris misled the readers.

"Dr. Tim Ball is a Victoria, British Columbia, Canada-based climatologist and former climatology professor at the University of Winnipeg."

FACT CHECK: Tim Ball is not and never was a climatologist or a climatology professor. He has a PhD in geography and was a geography professor at the University of Winnipeg. This is a matter of record and proven in a court of law.

Wrong on all counts. Global warming is not only real, its accelerating. The 12 years refers to the point beyond which we are all... ALL... screwed. If even 1% of this is genuine, dont you think risks of this magnitude need to be taken seriously? VERY damned seriously? Idiocy abounds in this whole set of denialist behaviours. Please remove bias from politics or religion from this subject, its a matter for public policy and science. Lets let them get the heck on with it. What we can do in the meantime is USE LESS FOSSIL FUEL DERIVED ENERGY, year in, year out, til we get to the point, sooner rather than later, where we're 100% clean. With the new battery systems coming onstream now, hydogen, wind and solar do it all.

omygodnoitsitsitsyou Simple question for you.

What is the optimal average temperature the globe (world) should be, before knowing if something is too hot or not hot enough you have to know what it should be, I await your wisdom now.

Higher sea level is not good for coastal populations and infrastructure. More intense weather events are less than optimal.