User blog comment:Jamesb1/Will Donald Trump be a good president?/@comment-27125187-20170123075954/@comment-5558012-20170123164919

I've read a study before about how Venus was much cooler than it is now but its warming was due to the good-old positive feedback loop (something to look forward to).

On Earth the biggest factor is the ocean (a huge carbon sink); as it warms it can't hold gases as well and they are released into the atmosphere. When we hit an uncontrollable feedback loop? No idea, we could already be in one and then whatever we do doesn't matter.