Thanks P.
I note also "Combustible waste is cleverly sucked through a system of tubes, rather than being taken away by polluting lorries, and burned in a combined heat and power plant to provide electricity and heat via the district heating system" What a good idea! (although I am not sure about the emissions from burning waste? PM10s and the like?)
In the UK, the Government seems to prefer micro-generation (one problem is the lack of people skilled in repair and installation; another is that you need to make and install about 25 million of them, which surely takes some resources?) and nuclear. Hopefully I don't need to comment on the latter

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I'm thinking particularly for existing stock, which in the UK will account for 70% of housing in 2050 (even though we have really ambitious new housing targets) and a large chunk of all CO2 emissions. Installing district heating may be expensive at the outlay, but will reduce CO2 emissions significantly, provide cheaper heating bills (good for the elderly - see reports of excess winter deaths) and give an opportunity during installation for things such as installing FTTP, and fixing water pipes. But that would require a lot of co-ordination...