Guardian:

Britons could save 30% of the carbon emissions associated with heating water at home by following simple advice such as lagging pipes and using low-flow taps, according to energy experts.

They estimate that installing just a few water-saving measures could save a typical household £225 per year on combined water and energy bills.

In a joint report launched today, the Energy Saving Trust (EST) and the Environment Agency examined the carbon impact of domestic water use in the UK. They concluded that heating water would continue to be a major source of carbon emissions from homes in the future unless urgent action was taken to reduce demand and the associated energy losses from inefficient boilers.

Here it the summary of the report:

Quantifying the Energy and Carbon Effects of Saving Water – Summary Report –

The full report is available here.