Most people believe that the world we live in today is normal. It's not. For most of the last 55 million years our planet was considered a "greenhouse" climate. It is only relatively recently that or planet has become an "icehouse" climate. The world we live in today is characterized by bi-polar glaciation which is geologically rare. In fact, no other instance of a bi-polar glaciation is found in the geologic record. About 5 million years ago, the temperatures started to plummet on the surface of the earth. The two conditions which led to this were the polar regions being isolated from the warm marine currents of the ocean and declining atmospheric CO2. The tipping point was 600 ppm. My point here is that these conditions till exist today. Over the last 500,000 years we have been cycling between glacial and inter-glacial cycles which were precipitated by the two conditions I mentioned above and triggered by orbital forcing due to Milankovitch cycles which in turn affects temperatures (‘insolation’) at 65N - a critical location for triggering Northern Hemisphere glaciation.
Trust me, we would be really better off at 600 ppm than we would at 250 ppm.
Additionally, given your emotional statement about being underwater, I can tell that you have no understanding at all of what the various IPCC forecasts actually mean or what they are based upon. I have forgotten more science than you will ever know and I can assure you that based on the current trends we can expect our atmospheric CO2 to be no greater than 580 ppm by the year 2100. And that our sea levels will rise no more than 0.252 meters.
