Tipping 400 PPM: Join the Conversation about our Climate Future at East Bay Green Drinks, 5/15/13
This week the National Oceanic and Atmospheric Administration (NOAA) announced that it measured carbon dioxide levels at over 400 parts per million in our atmosphere. Scientists say the last time CO2 levels were this high was three to five million years ago, when the planet as a whole was much hotter. This new level follows… Read more ยป