Climate Change: Why We Can't Wait

James Hanson, The Nation

This is an adaptation of a talk delivered February 26 at the National Press Club. Comments relating to policy are Dr. Hansen's personal opinion and do not represent a NASA position.

There's a huge gap between what is understood about global warming by the relevant scientific community and what is known about global warming by those who need to know: the public and policy-makers. We've had, in the past thirty years, one degree Fahrenheit of global warming.

But there's another one degree Fahrenheit in the pipeline due to gases that are already in the atmosphere. And there's another one degree Fahrenheit in the pipeline because of the energy infrastructure now in place -- for example, power plants and vehicles that we're not going to take off the road even if we decide that we're going to address this problem.

The Energy Department says that we're going to continue to put more and more CO2 in the atmosphere each year -- not just additional CO2 but more than we put in the year before.

If we do follow that path, even for another ten years, it guarantees that we will have dramatic climate changes that produce what I would call a different planet -- one without sea ice in the Arctic; with worldwide, repeated coastal tragedies associated with storms and a continuously rising sea level; and with regional disruptions due to freshwater shortages and shifting climatic zones.



John Feeney said…

Really, we can't wait on any of the whole environmental crisis. Unfortunately, many seem intent on talking it to death to delay action, while others want to suppress even talk. Yet the longer we wait, the less we'll be able to do to avert extremely serious consequences.
Anonymous said…
At school I'm taking an Environmental Science class. We have been working on a recycling project throughtout the whole school. Before I took this class whenever I heard the words global warming or recycling, it never affected me but now after taking this class for some time now I am starting to see things defferent. The point I'm trying to make is that people who don't teach themselves about these things won't know. Luckily I had this class to make me realize that something needs to be done but for those people who don't, they simply won't know to do anything about it. People want to not see it like it's not a problem. They want to ignore it.. Ignorance is bliss..

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