They failed to see the humor. Those caught up in religious fervor are a dour bunch. In 1992, it seemed to be the then-current level of 350 parts per million. These days, the European Union appears to be aiming for 550 ppm, a political compromise that bears no relation to a specific climate effect. Personally, I have long admired the principled position of Greenpeace to return to the pre-industrial level of 280 ppm.
Trouble is, it requires negative emissions.
Oh well, we'll just have to invent an oil burner that sucks up CO2 from the atmosphere instead of pumping it out. The British science briefing, which presented results from the Hadley Centre's new climate model, was perhaps more interesting. It will do next to nothing to greenhouse gas concentrations in the atmosphere. For most industrialized countries this would entail a 50 percent reduction in energy use by the year 2010. And even this economically suicidal level would do nothing to stabilize CO2.