This works through examples with numbers: https://ourworldindata.org/energy-substitution-method https://ourworldindata.org/energy-substitution-method Also not

This works through examples with numbers: https://ourworldindata.org/energy-substitution-method https://ourworldindata.org/energy-substitution-method Also note that heat pump based heating can be 5x as efficient as nat gas heating. Which means using gas to generate electricity to run heat pumps is an improvement. edit to add: also note that the oldest, dirtiest and least efficient plants will get shut first, having an outsized impact.