New Scientist: PINCH yourself. The US has taken its first big step towards cutting its greenhouse gas emissions. It has set targets for existing power plants. The move could be a breakthrough in the fight against climate change. The US Environmental Protection Agency (EPA) presented the draft plan on Monday. By 2030, emissions from existing power plants should fall to 30 per cent below 2005 levels. Power plants account for 40 per cent of US emissions. "This is very clearly the most significant action on climate...