Just days after admitting London would not meet its overall goal of dramatically cutting CO 2emissions by 2010 ( Mayor admits his carbon targets are impossible), Livingstone said he wanted a 20 per cent drop in carbon emissions from new developments.
The Mayor also demanded that CO 2emissions across the capital fall by 60 per cent before 2050.
Livingstone acknowledged the new objectives would be hard to meet but said he was confident his environmental goals could be achieved.
He said: 'In London I am proposing a challenging new target for our developers and planners.
'The new policies I am publishing today set tough but deliverable targets for reducing carbon emissions... we want to see the widespread use of decentralized energy, the highest standards of green building design and renewable energy incorporated wherever we can.'
The AJ understands it is the first time statutory carbon reduction targets have been set for London. These new policies are published in a document entitled Draft Further Alterations to the London Plan, which has now been put out for consultation.
Meanwhile 'radical' new guidance on sustainable design and construction - which slipped out quietly as Supplementary Planning Guidance last week - has been attacked by environmentalists for being 'watered down'.
The Green Party said new pointers for planners about the incorporation of sustainable measures such as rainwater harvesting were not as rigorous as the suggested guidance that first appeared in draft documents more than 14 months ago.
Green Party spokesman Darren Johnson said: 'I'm relieved that this planning guidance has finally been published, as it sets out demanding sustainability criteria that developers will have to meet.
'But I'm concerned that there appears to have been a general weakening in the wording between the draft guidance and the final. Many of the standards have been made less specific, and some of them have been removed entirely.'