Well I'm assuming that we are still alive, because the technology that would cause global warming would have been invented 250 years before it was in our world, meaning that global warming became a problem around 220 years ago. I am assuming that we will still be alive, therefore we will have dealt with Global Warming successfully. The singularity is when your average laptop has more processing power than a human brain. So far, we only have a few supercomputers that are as powerful as a human brain. If those were invented 250 years ago, and we continue to follow Moore's law (which dictates that computer processing power will double every 2 years), we will have reached the singularity by now. Mickey Mouse because Disney will probably just keep lobbying congress for a copyright extension so they never enter the public domain