Many countries - as well as cities, states and provinces - are taking global warming seriously and are working to reduce emissions and shift to cleaner energy sources.
Faced with the evidence, many deniers have started to admit that global warming is real, but argue that humans have little or nothing to do with it.
The most frightening interview I've ever done was with Dr. Lonnie Thompson of The Ohio State University on the subject of global warming.
I've been producing documentaries on global warming for 20 years and have seen the early warnings of extreme weather events come true.
I don't think global warming is to do with us, I think it's a natural circle. I don't think a few Ferraris make that much difference.
The pace of global warming is accelerating and the scale of the impact is devastating. The time for action is limited - we are approaching a tipping point beyond which the opportunity to reverse the damage of CO2 emissions will disappear.
I believe that global warming is a myth. And so, therefore, I have no conscience problems at all and I'm going to buy a Suburban next time.
Okay, I'll say I would go back in time and bring scientists with me and create a hairspray that would not cause global warming. But it would still give us '80s hair.
The truth is, as most of us know, that global warming is real and humans are major contributors, mainly because we wastefully burn fossil fuels.
There is no significant man-made Global Warming underway and the science on which the computer projections of weather chaos are based is badly flawed.
There is an air of unreality in debating these arcane points when the world is changing in such dramatic ways right in front of our eyes because of global warming.
The conversation on global warming has been stalled because a shrinking group of denialists fly into a rage when it's mentioned.
My first inclination is to be a bit skeptical about the claims that human-produced carbon dioxide is the direct contributor to global warming.
There isn't a more important issue in the world than global warming. Even the Cold War and the Bay of Pigs crisis were a notional threat.
We have no control over the outcome of anything. Like the planet and global warming, we don't control that. If politicians want a war we don't control that. Acts of terrorism, we can't control them.
Obama sounded like Al Gore on global warming. The more the case for man-made warming falls apart, the more hysterical Gore gets about an imminent catastrophe. The more public support his stimulus bill loses, the more Obama embraces fear-mongering.
The question of whether or to what extent human activities are causing global warming is not a matter of ideology, let alone of belief. The issue is simply one of risk management.
With a disaster like global warming, it's too late to worry about when it's looming except to figure out how to adapt to it.
Those who buy in to global warming wish to drastically curb human economic and industrial activities, regardless of the consequences for people, especially the poor.
When enough people care about autism or diabetes or global warming, it helps everyone, even if only a tiny fraction actively participate.
If you really accept that global warming puts the world at risk, then you think you would be open to any solution that could undo it.
