On our current path, all our great Gulf and Atlantic coast cities are at risk of meeting the same fate as New Orleans.

On our current path, all our great Gulf and Atlantic coast cities are at risk of meeting the same fate as New Orleans.

The best thing about improvements in health care is that all the climate-change deniers are now going to live long enough to see how wrong they were.

On moral grounds, I think that if you believe a certain outcome is a very possible outcome, you have an obligation to tell people that. With global warming, the probability of a bad outcome if we stay on our current emission trends is incredibly high. If you know a bad outcome is likely to happen, what right do you have not to communicate that? You go into a doctor's office, what are they going to do - not tell you the diagnosis?

If the politics of inaction and delay that have triumphed in this country continues for another decade, then Planetary Purgatory in the likely future facing our country before midcentury - probably in your own lifetime.

The science is crystal clear: we humans are the primary cause of global warming, and we face a bleak future if we fail to act quickly.

Much of the scientific community has been astonished that their increasingly strong and detailed warnings have been either ignored or attacked.