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We have known since the 1800s that carbon dioxide traps heat in the atmosphere. The right amount keeps the climate conducive to human life.

James Hansen

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James Hansen
Age: 83
Born: 1941
Born: March 29
Astrophysicist
Environmentalist
Physicist
Professor
University Teacher
Denison
Iowa
James Hansen
James E. Hansen
James E Hansen
J. E. Hansen
J E Hansen
J. Hansen
J Hansen
Hansen
Hansen J
Hansen J.
Hansen J. E.
Hansen JE
Jim Hansen
Known
Traps
Human
Carbon
Humans
Heat
Right
Atmosphere
Life
Keeps
Climate
Amount
Conducive
Since
Dioxide

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Adding CO2 to the air is like throwing another blanket on the bed.
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The evidence for human-made climate change is overwhelming.
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As a government employee, you can't testify against the government.
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I was lucky to grow up at a time when it was not difficult for the child of a tenant farmer to make his way to the state university.
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The five-year mean global temperature has been flat for the last decade
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The fact is fossil fuel carbon will stay in the surface climate system for millennia.
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The five warmest years over the last century occurred in the last eight years.
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We are on the precipice of climate system tipping points beyond which there is no redemption.
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CEOs of fossil energy companies know what they are doing and are aware of long-term consequences of continued business as usual. In my opinion, these CEOs should be tried for high crimes against humanity and nature.
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Politicians think that if matters look difficult, compromise is a good approach. Unfortunately, nature and the laws of physics cannot compromise - they are what they are.
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What we are doing to the future of our children, and the other species on the planet, is a clear moral issue.
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It would be immoral to leave young people with a climate system spiraling out of control.
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As you get more global warming, you should see an increase in the extremes of the hydrological cycle - droughts and floods and heavy precipitation.
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Several times in Earth's history, rapid global warming occurred, apparently spurred by amplifying feedbacks. In each case, more than half of plant and animal species became extinct. New species came into being over tens and hundreds of thousands of years. But these are time scales and generations that we cannot imagine.
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We have to, in the next ten years, begin to decrease the rate of carbon dioxide emissions and then flatten it out. If that doesn't happen in ten years, we're going to be passing certain tipping points. If the ice sheets begin to disintegrate, what can you do about it? You can't tie a rope around an ice sheet.
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Planet Earth, creation, the world in which civilization developed, the world with climate patterns that we know and stable shorelines, is in imminent peril.
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