Reuters: Global trade in credits representing reductions of planet-warming gas emissions should rise 56% this year as Europe tightens its flagship programme to tackle greenhouse gases, a carbon analysis group said on Tuesday. Greenhouse gas trade should grow to 4.2 billion tonnes from 2.7 billion tonnes last year as the EU Emissions Trading Scheme’s second phase launched this year tightens allowed emissions levels and adds new members, according to the 2008 annual carbon market outlook from …