We can also cool the earth via Sulfur Injection in the Stratosphere (like Vulcan eruptions demonstrated). German Spiegel[1] had an Article a few weeks ago that

We can also cool the earth via Sulfur Injection in the Stratosphere (like Vulcan eruptions demonstrated). German Spiegel[1] had an Article a few weeks ago that also mysteriously threatened international sanctions or war to countries who try that. [1] http://www.spiegel.de/wissenschaft/natur/klimawandel-geoengineering-als-plan-b-fuer-eine-zu-heisse-erde-a-1159027.html http://www.spiegel.de/wissenschaft/natur/klimawandel-geoengi...