Carbon Positive: It’s a big week in international climate negotiations with concurrent meetings of the G8 and Major Economies Forum (MEF) in Italy set to tackle – once again – the intractable issue of national commitments to lower greenhouse gas emissions. This would form the basis a collective global treaty of action to follow on from the Kyoto Protocol’s first commitment period. Commentators are describing the meetings as a critical juncture on the road to Copenhagen in December, the deadline set in …