Looking back, I underestimated the risks. The planet and the atmosphere seem to be absorbing less carbon than we expected, and emissions are rising pretty strongly. Some of the effects are coming through more quickly than we thought then.
Our carbon emissions have to eventually go to zero. We have to. Otherwise we're never going to have a stable climate and that's what our goal is for human civilization to thrive, a stable climate. We don't want one that's hotter, we don't want one that's colder, we want one that's stable.
Carbon-free energy is simply something we have to do. The time for talk is past. If we turn around net carbon emissions by 2020 rather than 2040, we get another 2° of fever rather than 3° - and that's a big difference.
There is much work to do to protect forests from over-timbering and oceans and lakes from over-fishing. We need to encourage and reward companies that create jobs to reduce the carbon footprints of offices and buildings and homes.
Controlling carbon is a bureaucrat's dream. If you control carbon, you control life.
The irony is that one of the things people want to solve climate change is more market - more price on carbon so that markets have something to chew on when they think about climate change instead of the complete monopoly, the absurdity of allowing these guys to own the sky for free - socialise all of the costs and privatise all of the profits.
Preventing global warming from becoming a planetary catastrophe may take something even more drastic than renewable energy, superefficient urban design, and global carbon taxes.
We need to go back to our relationship with nature and understand that those trees are our lungs. The earth is recycling as our body. The rivers are our circulation. This air is our breath. And the star stuff, the carbon, hydrogen, nitrogen that comes from distant galaxies is actually the molecules of your body.
Al Gore likes to say that mankind puts 70 million tons of carbon dioxide into the atmosphere every day. What he probably doesn't know is that mother nature puts 24,000 times that amount of our main greenhouse gas-water vapor-into the atmosphere every day and removes about the same amount every day. While this does not 'prove' that global warming is not man-made, it shows that weather systems have by far the greatest control over the Earth's greenhouse effect, which is dominated by water vapor and clouds.
If you don't like carbon, if you want to be zero carbon, then you might as well shoot yourself, dry up and blow away because you are carbon.
I was recently looking at what they can actually do to reduce consumption of petrol. It would be quite possible to build automobiles out of carbon fibre that would be just as strong, weigh 10 times less and consume 10 times less petrol.
Its obvious nonsense, but it makes nice people feel good about themselves to do their bit for the planet. Its vanity of a grotesque kind to believe that mankind, and our carbon footprint, has more impact on the future of Earth than Nature, which bends our planet to its will, as it sees fit.
I never tried to emulate my father. Anyone trying to do that would be a second-rate carbon copy.
But to truly transform our economy, protect our security, and save our planet from the ravages of climate change, we need to ultimately make clean, renewable energy the profitable kind of energy. So I ask this Congress to send me legislation that places a market-based cap on carbon pollution and drives the production of more renewable energy in America.
Things happen very quickly and they have to happen quickly in order to have vitality, which I think is essentially part of a good pot. But in addition it means that you can explore an idea and change it and then change it and then change it; I don't mean by changing the one pot, but you make one pot then you make another that's related to that; you make another - you can make 50 pots in a day and none of them are going to be carbon copies of any other, but they'll all be related because there's something going through your mind about the form on that particular day.
Our mission is, in truth, historic and world changing - to build, over the next fifty years and beyond, a global low carbon economy. And it is not overdramatic to say that the character and course of the coming century will be set by how we measure up to this challenge
You couldn't be here if stars hadn't exploded, because the elements - the carbon, nitrogen, oxygen, iron, all the things that matter for evolution - weren't created at the beginning of time. They were created in the nuclear furnaces of stars, and the only way they could get into your body is if the stars were kind enough to explode. So, forget Jesus. The stars died so that you could be here today.
Persistence is to the character of man as carbon is to steel.
The absorption of oxygen and the elimination of carbon dioxide in the lungs take place by diffusion alone. There is no trustworthy evidence of any regulation of this process on the part of the organism.
'Goals' and 'caps' on carbon emissions are practically worthless, if coal emissions continue, because of the exceedingly long lifetime of carbon dioxide in the air.