LIDAR is also being used at NASA to measure atmospheric CO2 concentrations.<p><a href="http:&#x2F;&#x2F;decadal.gsfc.nasa.gov&#x2F;ascends.html" rel="nofollow">http:&#x2F;&#x2F;decadal.gsfc.nasa.gov&#x2F;ascends.html</a><p>[PDF]<a href="http:&#x2F;&#x2F;esto.nasa.gov&#x2F;conferences&#x2F;estf2011&#x2F;presentations&#x2F;Abshire_ESTF2011.pdf" rel="nofollow">http:&#x2F;&#x2F;esto.nasa.gov&#x2F;conferences&#x2F;estf2011&#x2F;presentations&#x2F;Absh...</a>