Reuters: A compromise draft text to launch two years of negotiations for a global climate change pact has dropped a key ambition of tough 2020 emissions cuts for rich countries. The text, trying to end a dispute between the US and the EU on the last day of two-week talks in Bali, retained an ambition for global greenhouse gas emissions to peak in the next 10-15 years and to fall well below half of 2000 levels by 2050. The EU has so far insisted on a specific range of greenhouse gas …