Green taxes 'are making billions'
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Due to the lower carbon levels, better road safety and a reduction in traffic and enormous revenue raised they decide to extend the area covered.
The scheme has been a huge success and it's been extended West to cover parts of Westminster and Hammersmith & Fulham - some of the most congested areas in the UK.
Traffic in the existing zone has been reduced by some 20 per cent since charging began - preventing the gridlock that would most likely have been a regular feature for the capital.
This has brought many benefits to the capital, including more reliable journeys, a significant cut in CO2, and a reduction of up to 15 per cent in the most harmful vehicle emissions within the zone.
Independent research demonstrates that road safety has also improved, with up to 70 fewer personal road injuries per year as a direct result of congestion charging.
Lower congestion in London but more congestion on the motorways M1 and M25. M1 due to road works slowing traffic down from 70mph to 50mph and the M25 due to drivers avoiding travelling through London.
According to a published report from Transport for London, congestion levels in the zone are on average 26% lower inside the zone than in 2002 before the scheme was introduced.
The national environmental transport body, Transport 2000, claim that during charging hours 65,000 fewer car movements per day are being made into or through the zone.
Michele Dix, director of congestion charging, has said that, "the key of the congestion charge is to reduce levels of traffic coming into central London which is something we continue to see.
The air in London is noticeably cleaner, but not clean enough and more fume filtering laws are coming into force February 2008.
The latest figures from TFL show that so far there has been a 13% reduction in Nitrogen Oxide and 15% reduction in Particulate Matter vehicle emissions within the zone. Carbon emissions have been reported as being cut by 16%.
Transport 2000 have also reported that the congestion charge has led to an increase in alternative modes of greener transport, such as cycling, up by a third inside the zone.
The big question is where is all the money being spent and is it being spent wisely, on the right things?
The government is raising billions of pounds more in green taxes than it needs to remove the UK's "carbon footprint", a report says.
The TaxPayers' Alliance said emissions in 2005 had done damage worth an estimated £11.7bn, but green taxes and charges in that year had made £21.9bn.
It claimed ministers were "cynically" raising revenue rather than using the money to improve the environment.
But HM Treasury said the pressure group's claims were "ridiculous".