This page and organization, WePlanet, is a rebrand of RePlanet. They advertise as a grassroots movement, but are funded by a hedge fund with a significant investment in fossil fuels [1].
I think their whole schtick is prolonging the current situation and betting on slow and expensive nuclear is a good strategy to prevent real change.
[1] https://www.theguardian.com/environment/2023/jun/30/climate-...