site is hosted in is powered by renewable energy

Stupid metric. Nuclear power is vastly superior to all other forms of electricity production. Just because its “renewable energy” does not mean it’s life cycle CO2 is low or that it has a low environmental impact. It does not also take into account any regulatory requirements such as coal powered plants or water power plants which has a huge environmental impact.
I would say data centers that say they run on renewable energy is an environmental threat.

Just make a plugin that says buy nuclear power electricity.