Building a greener economy starts at home.
Electric trains use seven times less carbon dioxide than cars. With careful planning, railways could drastically cut emissions from a sector that now accounts for a quarter of the carbon in our air.
Housing currently accounts for almost one-fifth of the UK's annual carbon emissions.
A disappointing end for one of the UK's flagship environmental schemes.
Solar panels and efficiency savings are supposed to balance out building emissions by 2016, but the UK is way behind target.