Greentech Media: Global warming is likely to lead to ocean levels rising from a half-meter to one meter by 2100, roughly double what a 2007 United Nations-sponsored study on global climate change suggested — and that means trouble for the coastal areas that house one in ten humans on earth. That’s the gist of research presented this week at the International Scientific Congress on Climate Change in Copenhagen, where more than 2,000 scientists and government leaders are discussing the latest dire …