Using non-incineration technologies such as anaerobic digestion, mechanical biological treatment, pyrolysis and gasification would offer carbon saving potential nearly as large as that of Combined Cooling Heat and Power, the plan states.
It adds that if all the London waste that currently goes to landfill were utilised, it could generate enough electricity for up to two million homes, and heat for up to 625,000 homes. But, it said, the technology still needs to be explored and commercialised.
Launching his plan, Ken Livingstone said: Londons single biggest barrier to reducing its carbon emissions is the way in which energy supplied to homes and offices is produced and distributed.
He wants decentralised energy and has set a target to move a quarter of Londons energy supply off the National Grid and on to more efficient local energy systems by 2025.
The actions set out in this plan are radical the most comprehensive for any city I know. But they will need to be accompanied by further action from Government. It is completely inadequate to simply talk about climate change or make purely token actions, he added.
Announcing that climate change was his top priority as Mayor, Livingstone said £78 million of Greater London Authority finances would go into the plans four programmes: Green Homes, Green Organisations, Green Energy and Green Transport.
The plan shows that without action Londons carbon emissions will grow from 44 million tonnes to 52 mt by 2025. But by 2025, Livingstone wants the capital to reduce its CO2 emissions from current levels by 33 mt. He says a 20 mt reduction can be achieved through actions set out in the plan but the remaining 13 mt require national and international action.