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Recent warming coincides with rapid growth of human-made greenhouse gases. The observed rapid warming gives urgency to discussions about how to slow greenhouse gas emissions.

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
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Only in the last few years did the science crystallize, revealing the urgency - our planet really is in peril. If we do not change course soon, we will hand our children a situation that is out of their control.
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The fact is fossil fuel carbon will stay in the surface climate system for millennia.
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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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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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We are on the precipice of climate system tipping points beyond which there is no redemption.
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Adding CO2 to the air is like throwing another blanket on the bed.
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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 carbon emissions from tar shale and tar sands would initiate a continual unfolding of climate disasters over the course of this century. We would be miserable stewards of creation. We would rob our own children and grandchildren.
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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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It would be immoral to leave young people with a climate system spiraling out of control.
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The last time the world was three degrees warmer than today-which is what we expect later this century-sea levels were 25m higher. So that is what we can look forward to if we don't act soon.
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The evidence for human-made climate change is overwhelming.
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A level of no more than 350 ppm is still feasible, with the help of reforestation and improved agricultural practices, but just barely - time is running out.
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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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The forcings that drive long-term climate change are not known with an accuracy sufficient to define future climate change.
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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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I think we have a very brief window of opportunity to deal with climate change. No longer than a decade at most.
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...chief executives of large fossil fuel companies to [should] be put on trial for high crimes against humanity and nature [Hansen] accusing them of actively spreading doubt about global warming in the same way that tobacco companies blurred the links between smoking and cancer.
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Rising carbon price is essential to 'decarbonize' the economy - to remove the nation towards the era beyond fossil fuels.
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As a government employee, you can't testify against the government.
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