General Motors Vice Chairman Bob Lutz recently called global warming a "total crock of s--t." So much for intelligent leadership, but thanks for giving America a clear explanation of why your company is struggling with daily layoffs and market share implosion. Why does GM keep someone around who's still...

Last night's Democratic debate in Texas was sponsored (once again) by polluting coal interests, whose laughable ads about pie-in-the-sky "clean coal" littered CNN's debate coverage. Gee, what a surprise then that no questions were asked about global warming in the state that is the number one emitter of CO2 emissions....

Something I've been waiting for my entire life has just happened. I've been a huge Beatles fan for decades and, in fact, my very first display of activism was not on behalf of a cause, but on behalf of them. When I was 12, I was so obsessed with the...

If there is anyone out there wondering if I made it out of Iceland a couple weeks ago, the answer is yes. The freakish high winds finally calmed down long enough to fly home. But if you're wondering where I am right this minute you can find me in...

I'm in Iceland. OK, don't ask. I know it sounds crazy but it was on the way home from Oslo and someone said it's magical in the wintertime, just pack a lot of sweaters. Oh, and I could see a glacier! So I couldn't pass up the opportunity.

The ride...

The IPCC (Intergovernmental Panel on Climate Change) has done its job over the course of the last two decades and given the world enough answers to generally conclude the science on global warming is now settled. To accomplish this, thousands of scientists, for years, donated their evenings, weekends, any free...

The magic continued last night in the streets of Oslo as hundreds of people paraded up the main drag in front of the Grand Hotel, holding torch lights and thank you signs. The festival of lights is another Nobel tradition and it ended with Al Gore and Dr. Pachauri stepping...

The chairman of the Norwegian Nobel committee pulled no punches today at the opening ceremonies of the 2007 prize presentations in Oslo. Calling on the world to act, he expressed the committee's deep concern about the future. "The Norwegian Nobel committee rarely raises its voice. Our style is largely sober....

Okay, I can't shake this. I'm taking it very personally. I'm bummed. I've been a Prius owner since 2000. I've promoted the hybrid in countless interviews. I badgered all my family and friends to buy them. The car was -- is -- brilliant, showcasing good design and efficiency, and...

Congratulations to Al Gore and the Intergovernmental Panel on Climate Change (IPCC). After this, will it still be possible for the United States government to continue to do nothing to address the urgent crisis of global warming? The awarding of the Nobel Peace prize, one of the world's most prestigious...

Toyota has gotten a lot of mileage out of portraying itself as the greenest, most fuel-efficient car company on the planet, and has reaped the benefits both financially and public relations wise. Yet they are careening toward becoming the most hypocritical car company on the planet by aggressively opposing desperately...

A global warming denier group is attacking The Down To Earth Guide to Global Warming, the new children's book I co-authored with Cami Gordon.

Our crime? It turns out one of the illustrations in the book was accidentally mislabeled. This has got the gang at the at the Science...

As severe storms and the resultant flooding continue to batter the Midwest with deadly results, the media is filled with scary stories of the destruction and misery being inflicted. We see headlines about 300,000 Chicagoans without power, state of emergency declarations across four other states, dozens killed by storms...

As severe weather events become more and more frequent, we are constantly reminded of what we can lose in the blink of an eye. Last week, Kansas Governor Kathleen Sebelius shared with me her eerie feelings upon seeing the footprint of an entire town erased in a matter of moments,...

Exxon CEO Rex Tillerson said about global warming in January, "It is clear that something is going on. It is not useful to debate (the issue) any longer."

If that's the new company line, Mr. Tillerson, then how do you explain the $2.1 million that ExxonMobil and its corporate foundation...

We hope that by the time you read this, the solutions to global warming will be well under way. You already know from living with us, how concerned we are about this problem. Sometimes, we go over board with our reactions to everyday annoyances like over -packaged products, leaving lights...

Extreme weather is becoming the norm. It's all but taken up residence in the Top Story slot of our evening news shows. Pretty soon we'll need another category: "extremely extreme weather."

Right now we've got four different kinds of extreme weather plaguing our country. Drought in...

Heading towards Charlottesville, it was emotional just entering the Virginia border. That weighed heavy on all of us all day.

The roller coaster continues. Sheryl couldn't be with me tonight because of a previous commitment but luckily rock stars have rock star friends.

Tonight, I spoke outside the gorgeous...

I don't even know where to begin with this one, but I will start by saying how embarrassed I am for you. It shocks me that someone with your stature could know so little about global warming.

First off, thanks for making the case for us. The things you mention...

Webster's Dictionary defines "sloppy" as something that is "careless" or "negligent." For the moment, I can't think of a better word to describe the background research CNBC reporter Joe Kernen did regarding the state of global warming science when Sheryl and I appeared on his program the other day.