News in brief: ‘Hot air is killing us,’ warns UN chief
In other news this week: World leaders meet to take stock of 50 years of green policy failure, EU promises firefighting back-up to Greece, and Romania pledges 2030 coal power phase-out.
In other news this week: World leaders meet to take stock of 50 years of green policy failure, EU promises firefighting back-up to Greece, and Romania pledges 2030 coal power phase-out.