Let's not go here

National policies don't keep up with rhetoric

"When I look at the next 10 years," he said, "even if I take into consideration the pledges made after the Copenhagen meeting, the best case is that this could put us on a trajectory in line with 3.5 degrees Celsius."

To hit that 2-degree target and remain there, he said "decarbonization" needs to increase by 400 percent, "and mainly in the countries where climate change is not high on the agenda."

"Almost all the energy infrastructure that we'll be using in 2020 is either in place now, or in the final investment stage," he said.

Scenario to Cap World Emissions by 2020 Is Fading Fast, Warns IEA Economist