16 Apr

The most recent report of the Intergovernmental Panel on Climate Change –“Climate Change 2013 – The Physical Science Basis – Working Group I Contribution to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change”– can be found here:

Here’s one of the “summary” side-bars: “The atmospheric concentrations of carbon dioxide, methane, and nitrous oxide have increased to levels unprecedented in at least the last 800,000 years. Carbon dioxide concentrations have increased by 40% since pre-industrial times, primarily from fossil fuel emissions and secondarily from net land use change emissions. The ocean has absorbed about 30% of the emitted anthropogenic carbon dioxide, causing ocean acidification.”

CAUTION: except for these “summary sidebars,” this report is highly technical.  But the conclusions are irrefutable.  In their words:

“Human influence on the climate system is clear. This is evident from the increasing greenhouse gas concentrations in the atmosphere, positive radiative forcing, observed warming,
and understanding of the climate system.”


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