The proportion of total UK carbon dioxide emissions arising from domestic heating (space heating and water heating combined) and cooking has remained more or less constant over the last 10 years (from 1997 to 2006, the latest year for which data is available). Domestic heating represents between 18 and 19 per cent. of total UK carbon dioxide emissions, while domestic cooking represents 1 per cent. of total UK carbon dioxide emissions. Carbon dioxide emissions from domestic air conditioning are currently extremely small (estimated to be less than 0.1 million tonnes of carbon dioxide per annum which equates to around 0.02 per cent. of the UK total CO2 emissions). However, demand for air conditioning is expected to double by 2020. We have no estimates of other greenhouse gas emissions arising from these sources although these are likely to be very small as a proportion of total UK emissions.