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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.

James Hansen

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James Hansen
Age: 83
Born: 1941
Born: March 29
Astrophysicist
Environmentalist
Physicist
Professor
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Denison
Iowa
James Hansen
James E. Hansen
James E Hansen
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More quotes by James Hansen

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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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The five-year mean global temperature has been flat for the last decade
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As a government employee, you can't testify against the government.
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I tend to be naive and gullible, I guess, but I try to believe that governments believe what they say.
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Adding CO2 to the air is like throwing another blanket on the bed.
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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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If we drive our fellow species to extinction, we will leave a far more desolate planet for our descendants than the world we inherited from our elders.
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The urgency derives from the nearness of climate tipping points.
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The fact is fossil fuel carbon will stay in the surface climate system for millennia.
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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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We have known since the 1800s that carbon dioxide traps heat in the atmosphere. The right amount keeps the climate conducive to human life.
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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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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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Money has too big an influence on our politics in Washington and somehow we need to do something about that.
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How long have we got? We have to stabilize emissions of carbon dioxide within a decade, or temperatures will warm by more than one degree... We don't have much time left.
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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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The five warmest years over the last century occurred in the last eight years.
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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.
James Hansen
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Because cap and trade is enforced through the selling and trading of permits, it actually perpetuates the pollution it is supposed to eliminate.
James Hansen