CO2 is more like nuclear waste than acid rain

Have you insulated your house and slashed your driving?

Greenhouse gas levels currently expected by mid-century will produce devastating long-term droughts and a sea-level rise that will persist for 1,000 years regardless of how well the world curbs future emissions of carbon dioxide, an international team of scientists reported yesterday.

Top climate researchers from the U.S. National Oceanic and Atmospheric Administration, Switzerland and France said their analysis shows that carbon dioxide will remain near peak levels in the atmosphere far longer than other greenhouse gases, which dissipate relatively quickly.

"I think you have to think about this stuff as more like nuclear waste than acid rain: The more we add, the worse off we'll be," NOAA senior scientist Susan Solomon told reporters in a conference call. "The more time that we take to make decisions about carbon dioxide, the more irreversible climate change we'll be locked into."

At the moment, carbon concentrations in the atmosphere stand at 385 parts per million. Many climate scientists and the United Nations' Intergovernmental Panel on Climate Change have set a goal of stabilizing atmospheric carbon at 450 ppm, but current projections put the world on track to hit 550 ppm by 2035, rising after that point by 4.5 percent a year.