[PCA] NEWS: Carbon dioxide levels already a danger

[Olivia Kwong]

http://www.cnn.com/2008/TECH/science/11/21/climate.danger.zone/index.html?section=cnn_latest

Carbon dioxide levels already a danger
By Matthew Knight
For CNN

LONDON, England (CNN) -- A team of international scientists led by Dr 
James Hansen, director of NASA's Goddard Institute for Space Studies, say 
that carbon dioxide (CO2) levels are already in the danger zone.

Concentrations of CO2 in the atmosphere currently stand at 385 parts per 
million (ppm) and are rising at a rate of two ppm per year. This is 
enough, say the scientists, to encourage dangerous changes to the Earth's 
climate.

See the link above for the full article.