Why it matters: A global entity like the UN climate panel can have a big impact on the acceptance of nuclear power, as calls to address climate change intensify and the challenges facing the nuclear industry grow around the world.

The big picture: Nuclear power, which provides 30% of the world’s zero-carbon electricity, is facing international skepticism over past accidents and public fear about its radioactive waste.

In the U.S., numerous plants are poised to shut down earlier than their licenses allow — and some already have — due primarily to market and policy hurdles.

Natural gas has largely made up the difference after these plants have shut down, so greenhouse gas emissions ticked up in some parts of the U.S.

The details: A letter being sent to leaders of G-20 nations claims the recent report by the UN Intergovernmental Panel on Climate Change includes “misinformation about nuclear energy, contrasts nuclear negatively to renewables, and in some cases suggests an equivalency with fossil fuels.”

“While IPCC authors note that public fears of nuclear are an obstacle to its diffusion, in several instances they reinforce unfounded fears,” the letter states.

The signatories include:

Tom Wigley, a climate scientist at the University of Adelaide in Australia

Kerry Emanuel, atmospheric science professor at the Massachusetts Institute of Technology

David Lea, professor of earth science at the University of California

What they’re saying: Emanuel told Axios the IPCC’s latest report contains a number of factual errors and displays a bias against nuclear power that many environmental groups struggle with.

“The IPCC says, correctly, that even 1.5 degrees of warming is dangerous, especially for the developing world. We agree with that, on the other hand it throws cold water on what empirically is the fastest way to mitigate emissions we know about today.” — Kerry Emanuel

He cited a statement in Chapter 5 of the report that says replacing fossil fuel power plants with nuclear energy has mixed effects for human health — despite the millions of premature deaths that occur worldwide from coal-fired electricity, for example.

Jonathan Lynn, an IPCC spokesman, rejected the accusation that the panel has it in for nuclear power, telling Axios: “We completely reject the idea we are biased about nuclear power or anything else.”