Carbon Positive: Prices for Certified Emissions Reductions (CERs) are hovering around their highest levels this year after a recovery since mid-June. Rises have been greatest in the 2009 vintage of the UN carbon offsets amid question marks over short-term supply. In the secondary market, for the trading of issued CERs, the Dec 2009 futures price closed at EUR12.68 on the European Climate Exchange on August 3. Prices in this benchmark CER contract have risen almost 20 per cent since a low-point in …