And they ought to

Environmentalists concerned about climate change should back nuclear power.  It's real simple;  we're going to need energy, and we're going to need greenhouse gas emissions-free energy.  Over the next couple of decades, nuclear is the only expandable technology that supplies sufficient base power to satisfy our needs.

So it makes sense that climate change is forcing some environmentalists to back nuclear power.

Quoting:

"The risks associated with the expanded use of nuclear energy are orders of magnitude smaller than the risks associated with fossil fuels," the letter added.

 Furthermore, as written in the esteemed New York Times:

Betting on the Need, Scientists Work on Lighter, Cleaner Nuclear Energy

"But if the world decides in the 2030s and 2040s that it is time to deploy a new fleet of reactors, those will be based on work done in the few labs like this over the next decade, experts predict.

“In a carbon-constrained world, with that time frame, you better have some advanced reactors ready to go,” Dr. Peters said."

 That's right.

Finally, Dana Milbank, writing in the Washington Post in "The New Climate Denialism:  Carbon Dioxide is Good for You", has this pithy, frameable quote:

"And the solution to climate change is not to ban energy but to make it cleaner."   [Cleaner including lower CO2 emissions]

Totally.