G7 leaders target zero-carbon economy

Global climate talks received a symbolic boost today, as the G7 group of rich nations threw their weight behind a long-term goal of decarbonising the global economy over the course of this century. The 40-70% reduction on 2010 levels by 2050 is the range for 2C set out by research organisation Climate Analytics earlier this year. It also just about reaches the 70-95% range of emissions reduction by 2050 that would be consistent with limiting warming to 1.5C. A review of whether to adopt this tougher temperature target is expected to conclude at UN climate talks in Bonn this week.