CO2 fuel emissions

Here are the CO2 emissions of various types of heating system. You can see that there is a distinctly renewable end to the graph with wood logs, wood pellets, and heat pumps way ahead of the fossil fuels because of their low CO2 emissions. A heat pump powered by the national grid isn't quite as good as wood heating (but very nearly), and a heat pump on a 100% renewable electricity supply is very good indeed.

Heating accounts for a big share of domestic CO2 emissions. Upgrading the insulation in our homes, as well as first