<p>I couldn’t find my original source on that, but a quick search did turn up a javascript-based graph set of temperatures from 1990 to now. I’d run significance tests on it, but I couldn’t figure out a way to extract the raw numbers. The visible trends APPEAR to be stable for the last ten years, but I can’t reasonably press this any further until I can either do the stats myself or find the document I originally “cited”.</p>
<p>[AMSU-A</a> Temperatures](<a href=“http://discover.itsc.uah.edu/amsutemps/]AMSU-A”>http://discover.itsc.uah.edu/amsutemps/)</p>
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<p>Can’t immediately pull up details on this beyond a vague mention in the Wikipedia article, but wasn’t it determined a few years back that Ethanol’s immediate environmental impact is worse than Gasoline’s?</p>