The world’s top panel of environmental experts is set to release a new report on human-caused climate change this weekend. The Intergovernmental Panel on Climate Change is expected to summarize its three previous reports this year that have lobbied for drastic change to avoid environmental catastrophe. Panel member Kirsty Hamilton says evidence that human activity is causing global warming is now beyond dispute.

Kirsty Hamilton: “The IPCC report is very important. It’s their fourth assessment report, and it’s 17 years after the first one, so it’s an entire generation worth of scientific knowledge. It’s becoming ever more confident about the observations they were making way back in 1990. So, clearly, that’s just a solid reinforcement for governments and everybody on the planet about the urgency of the matter.”

The release of the report comes amid censorship allegations. This week the World Wildlife Fund accused leading polluter nations of diluting the climate report to discourage taking action.