Reuters: The world is in danger of spending its “carbon budget” by about 2025 and risks temperatures rising beyond 2 degrees Celsius unless nations adopt a flexible carbon accounting system, conservation group WWF says in a report. The report by Dutch energy consultancy Ecofys and commissioned by WWF, says rich nations must cut emissions by 80 percent by 2050 and global emissions of greenhouse gases must be cut by 30 percent from 1990 levels by 2030. Failure to do so would lead to rapid …