An unreleased draft of the U.N.’s next major climate report reportedly states that scientists are more certain than ever that man’s actions are warming the planet — even as the report struggles to explain a slow-down in warming that climate skeptics have seized upon.
Global surface temperatures rose rapidly during the 70s, but have been relatively flat over the past decade and a half, according to data from the U.K.’s weather-watching Met Office. Climate skeptics have spent months debating the weather pattern, some citing it as evidence that global warming itself has decelerated or even stopped.
“The absence of any significant change in the global annual average temperature over the past 16 years has become one of the most discussed topics in climate science,” wrote David Whitehouse of the Global Warming Policy Foundation in June. “It has certainly focused the debate about the relative importance of greenhouse gas forcing of the climate versus natural variability.”