Tom Zeller Jr The New York Times

The warnings were stark and issued repeatedly as far back as 1972: If the cooling systems ever failed at a "Mark 1" nuclear reactor, the primary containment vessel surrounding the reactor would probably burst as the fuel rods inside overheated. Dangerous radiation would spew into the environment. Now, with one Mark 1 containment vessel damaged at t...

Two mock gateways set up by environmental campaigners - a fiery red one symbolizing the perils of climate change and a green one representing an international climate accord to address it - greeted delegates on Monday as they filed into a conference center here.

The warnings were stark and issued repeatedly as far back as 1972: If the cooling systems ever failed at a "Mark 1" nuclear reactor, the primary containment vessel surrounding the reactor would probably burst as the fuel rods inside overheated. Dangerous radiation would spew into the environment. Now, with one Mark 1 containment vessel damaged at t...

Two mock gateways set up by environmental campaigners - a fiery red one symbolizing the perils of climate change and a green one representing an international climate accord to address it - greeted delegates on Monday as they filed into a conference center here.