And the gas comes from biowaste, which is actually nice, because municipalities which have the most effective ways of collecting and processing biowaste can export the resulting biogas to e.g. surrounding municipalities and in this way generate income to run things for everyone.

This means waste must be sorted somehow, but this is a rational thing to do anyways.

And it pisses me off immensely to see some idiots throw plastic bags or non-food waste to the biowaste bins. There are signs in many languages and even with pictures, but some people still manage. Such biowaste cannot be used for gas generation, so it's kind of hurting all the inhabitants.