VC Star: The Texas oil companies behind Proposition 23 don’t call it an attempt to deny the existence of worldwide climate change. They just call the landmark 2006 California law they’re essentially trying to repeal a "job killer." But this proposition, which would put AB 32, the Global Warming Solutions Act, in abeyance until unemployment levels drop to 5.5 percent or lower for a full year, amounts to getting rid of the world’s strongest effort to do something about climate change. If …