london

Fashion is a fickle beast but now a whole city is going retro (well, not quite but it was too good a pun to waste). The long-awaited plan to retrofit all buildings owned and operated by the Greater London Authority (GLA) with energy-saving systems and technology is finally in motion with contracts awarded to companies which are going to slash the capital's emissions.

While much of the discussion about energy efficiency in buildings has focused on new houses, there are still millions of older buildings that lack proper insulation or top-notch heating systems. No matter how good those eco-towns are, if and when they're built they'll only represent a small proportion of the building stock in the UK. Fortunately, the GLA have a cunning plan.

London mayor Ken Livingstone was never going to get an easy ride over his planned changes to the congestion charge, and Porsche's threat of a legal challenge is perhaps no big surprise. Famed for its fast, sleek, inefficient cars, it claims the new £25-a-day charge on gas guzzlers is "unfair and disproportionate".

As well as the promised judicial review, the company has started a petition for the Jeremy Clarksons of this world to voice their opposition to Ken's plan. "We know that huge numbers of people in London and across the rest of the country support our case," they claim. "They agree with us that it would be bad for London - that it is unfair and sends the wrong message about what sort of a city London is whilst having no meaningful benefit on the environment."

The Olympic Energy Centre

The Olympic Delivery Authority has long said it wants the London Olympic games in 2012 "to be the first sustainable Games".

Well, today it's unveiled a design for its energy centre - complete with a combined cooling, heat and power (CCHP) plant fuelled by sustainable biomass (woodchip) and natural gas.

As reported in yesterday's news, London's congestion charge is being modified again to improve the capital's green credentials. From October, vehicles emitting the highest amounts of CO2 will have to pay £25 a day which gets a big thumbs-up, while the most efficient cars will get into central London free of charge.

Some commentators have pointed out that this effectively changes the purpose of the charge from reducing congestion to reducing pollution, and that's no bad thing. According to the World Resources Institute, road transport spews out around 10 per cent of global emissions (pdf), so providing incentives to move to more efficient models is going to do a lot to cut those exhaust fumes.

As Mayor of London, Ken Livingstone might not be the perfect politician but at least he's streets ahead of central government on climate change and reducing emissions in the capital. His latest ploy is to hold a light bulb amnesty during which Londoners can exchange their old incandescent bulbs for a bright new energy-efficient one.

According to london.gov.uk, you can take up to two old-fashioned bulbs to any London branch of B&Q between Friday 11 and Sunday 13 January and exchange them for compact fluorescent lamps (CFLs) provided by British Gas. Nice.

With the climate conference rumbling on in Bali, the time is ripe for people around the world to stand up, be counted and demand tough action to prevent climate change. Time, in fact, for the Global Day of Action, which this year falls on Saturday 8 December so there's just a few days to go.