For the past week, concentration of co2 in the atmosphere, measurements from Mauna Loa Observatory in Hawaii, in parts per million (ppm):
co2 as 2014 ends
Pushing and magic number of 400 ppm
By jim williams
January 1, 2015 at 10:00PM
December 31 - 399.57 ppm
December 30 - 398.89
December 29 - 398.93
December 28 - 398.64
December 27 - 398.38
Weekly value one year ago, Dec. 31, 2013 — 397.26 ppm
Weekly value 10 years ago — 377.78 ppm
800,000 years ago — 260 ppm
about the writer
jim williams
Several home watch businesses joined together in the Minnesota Home Watch Collaborative to stay vigilant across the whole state.
