>Use thermal movement to generate electricity without a need for a temperature difference.

https://scitechdaily.com/physicists-harness-the-atomic-motion-of-graphene-to-generate-clean-limitless-power/amp/

If I understood it correctly, this would basically cool down the environment without creating even more heat somewhere else, instead converting that heat to usable power. Does it mean it's possible to reduce entropy globally and not just locally?