World leaders wasted a decade debating whether global warming is happening, and now need to act quickly to limit its effects, former Intergovernmental Panel on Climate Change Chairman Robert Watson said at the Oceanology International conference in London March 11. Watson, now chief scientific aviser at the UK environment ministry, said “If we don’t want to be faced with sea level rise for thousands of years, we have to act now to reduce CO2.’’ (Bloomberg, March 11)