Guardian: Britain’s greenhouse gas emissions fell slightly last year as homes and offices used less fuel during the mild winter and recycled more waste. Overall, UK greenhouse gas emissions for 2006 dropped to 652.3m tonnes, a reduction of 0.5% on the previous year, figures from the Department for Environment, Food and Rural Affairs show. CO2 emissions, accounting for 85% of the total UK greenhouse gas output, dropped by 0.1% in the same period. The figures put Britain on course …