Sunday, January 11, 2015

Climate change: how do we know?

A piece from NASA, giving the arguments why global warming is real.

This graph, based on the comparison of atmospheric samples contained in ice cores and more recent direct  measurements, provides evidence that atmospheric CO<sub>2</sub> has increased  since the Industrial Revolution.  (Source: [[LINK||http://www.ncdc.noaa.gov/paleo/icecore/||NOAA]])

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