Guardian: It looked like the palest of green budgets but Treasury calculations suggested that the series of small but significant transport, tax and investment measures announced could cumulatively lead to the reduction of nearly 80m tonnes of CO2 – nearly 15% of all UK climate change emissions – by 2020. The biggest benefits, said the Treasury, should come from the new green investment bank which the government hopes will encourage a £2bn kick-start for the low carbon economy. Together with …