The document discusses trends in UK energy use and drivers of carbon emissions from 1971-2011. It shows that while industrial and transport energy use increased, domestic use decreased. Energy efficiency is identified as a key contributor to future decarbonization efforts due to its ability to lower carbon abatement costs. However, policies to promote energy efficiency in buildings are becoming less ambitious over time. Effective policies require a package of incentives, regulations, and engagement across multiple levels of government.