Heat pumps run on electricity, so do not use fossil fuels or emit CO2, which contributes to global warming. This also means that as time goes on and electricity is sourced more from renewable energy sources, heat pumps will become an even more eco friendly option.
Heat pumps are required to be 350% efficient. One unit of electricity makes 3.5 units of heat. Compared with modern A rated boilers that run at 90% efficiency, this is a huge improvement.
Heat pumps are a great option if you want to eliminate fossil fuel use from your home.