The document outlines targets for the UK to increase energy efficiency by 20%, reduce CO2 emissions by 20%, and source 20% of energy from renewables by 2020. It describes how a typical home built in the 1970s emitted 7 tonnes of CO2 per year, but upgrading insulation reduced emissions to 5 tonnes, and a smart electric home today using smart appliances and 15% renewables can emit 3.2 tonnes. The smart grid enables further CO2 reductions to 2.3 tonnes by 2020 and 1.6 tonnes by 2030 as the grid continues to decarbonize.