Gay marriage? None of my fucking business.
This comes across as "I'm not being discriminated against, so I don't care if other people are". I don't know if that was your intent, or not.
... the claim is that an increase in CO2 concentrations from about 380 PPM to 600 PPM will cause a "tipping effect" and exponential feedback loop causing catastrophically accelerated global warming.
Is that the scientific consensus? Or your straw man?