The Government has set a target of reducing carbon emissions to the atmosphere by 60% by 2050. This Information Paper evaluates the scope for cost-effective reductions in emissions through energy efficiency measures in housing. From a starting point of 2001, it considers the potential for reductions by 2010, 2020 and 2050. It is derived from a wider BRE study, 'Reducing carbon emissions from the UK housing stock' (BR 480). 8 pages.