Melanie Fitzpatrick

Melanie Fitzpatrick is a climate scientist with Union of Concerned Scientists

Articles by this author

Tuesday, May 14, 2013
400 PPM: We’ve Never Been Here Before
We’ve just crossed a sobering milestone. For the first time since humans have walked the planet, the amount of carbon dioxide in the atmosphere at Mauna Loa Observatory has reached 400 parts per million.
Read more