Bill McKibben is at Wake Forest University in Winston-Salem on Tuesday. His 1989 book “End of Nature” is considered the first to describe global warming to the public.
The Winston-Salem Journal reports that McKibben’s talk will focus on what he calls the most important number in the world.
The number 350 represents the parts per million of carbon dioxide in the atmosphere that many scientists consider safe for humans. The amount of carbon now in the atmosphere is close to 390 parts per million and has been above the target since soon after McKibben’s book came out a generation ago.
At 0.0004 mole fraction, most people will keel over and die. At 0.00045, aliens who have been buried for 100 years will come up through the pavement. At 0.0005 ….. this ….