The coalition have today (Wednesday, December 8) introduced to parliament a bill to provide homeowners with four-figure loans to make their properties more energy-efficient. The energy security and green economy bill is expected to make power companies legally obliged to slash greenhouse gas emissions in their customers' homes. Companies could be offering incentives, such as foreign holidays, for customers to take out 'green deal' loans. The government needs to cut by 20% the energy used for heating water and rooms in buildings, which generates about a third of the UK's carbon emissions.