A report has been produced showing not enough is being done to meet carbon emission targets in London.
The London Assembly Environment Committee has produced a 'report card' and gives Mayor Boris Johnson a score of four out of ten.
Performance in the retrofitting of homes was one of the lowest, with a score of 3 out of 10.
The report recommends that more is done on local and low-carbon energy, especially solar, and on helping businesses to cut their energy bills.
"Frankly, the committee is disappointed with the progress being made on carbon reduction targets. The Mayor is missing targets on emissions from homes, decentralised energy generation and retrofitting workplaces, by big margins. The Mayor must try harder at these subjects, get more out of the government and give more help to boroughs. Transport emissions are fairly close to their 2015 target - but we urge Transport for London (TfL) - the capital's biggest energy consumer - to take proactive action and negotiate more vigorously for low-carbon energy. TfL could also generate more of its own electricity."
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