New Scientist: HAVE you ever thought that switching to low-energy light bulbs or buying a hybrid car is pointless? It's not. All those little changes do actually add up.
We haven't fixed global warming, but new evidence suggests that the world has taken its foot off the gas when it comes to carbon dioxide emissions. In 2012, the growth in emissions was 1.1 per cent, compared with an average of 2.9 per cent since 2000. Perhaps more importantly, the rise was less than a third of the 3.5 per cent growth in global...