Business Green: New research from analyst firm New Carbon Finance suggests that the average price of carbon on the world’s carbon markets will soar to $49 (£28) a tonne over the next 12 years. The EU is expected to lead the gains, with the price of credits in its emissions trading scheme more than doubling from an expected average of $39 during the current trading period up to 2012 to $97 by 2020. Similarly, large-scale price hikes are also predicted for planned carbon markets in North …