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> Electricity moves through a network

I know. We haven't interconnected the entire planet. So it still depends on what region we are talking about. Even inside a country some regions might be barely connected (see the Texas power grid).

> might cause a coal power station to be started in Poland

It also might cause a natural gas station to be started up. Again, that depends on the location. Usually it would cause a natural gas power plant to start up. It could also be pumped storage hydro, or even batteries.

Since you are talking about lack of knowledge, it's useful to point out that coal is very unlikely to be used as a peaker plant, just like we don't start nuclear power stations for the same purpose. Generally they are used for baseline power.

We aren't going to be starting coal plants because France is using more power. Some countries might decide to build more though, to account for the predicted energy usage growth.




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