Scientific monitors reported that the gas had reached an average daily level that surpassed 400 parts per million — just an odometer moment in one sense, but also a sobering reminder that decades of efforts to bring human-produced emissions under control are faltering.In case you are wondering this means that we are on track to possibly see a rise in the average temperature of 4 degrees C towards the end of the century. If 4C doesn't sound so bad consider that scientist think it means the extinction of about half of the species now living on our little spaceship. We are so screwed.
The best available evidence suggests the amount of the gas in the air has not been this high for at least three million years, before humans evolved, and scientists believe the rise portends large changes in the climate and the level of the sea.
Friday, May 10, 2013
Welcome to 400 Parts Per Million
A very sobering event happened yesterday. We hit a new carbon dioxide milestone of 400 ppm: