This week's issue of Science is devoted to the latest news about global warming - and in particular about the state of our icecaps. And that news is bad. The West Antarctic ice sheet seems to be slowly melting. In Greenland, glaciers are rushing towards the sea faster than ever before. More generally, a study of the climate of the Eemian interglacial about 125,000 years ago suggests that the current expected level of global warming will result in significant melting - enough to produce a sea-level rise of 4-6 metres over 500 years, or about a metre a century. That's enough to put most of Bangladesh underwater, and threaten many of the world's coastal cities. Meanwhile, according to the editorial (the one part of Science not behind a paywall), CO2 levels are at the highest they've been for 10 million years.
Are we worried yet...?