London Mayor Ken Livingstone's Climate Change Action Plan, framed in April 2007, says: "More widespread carbon pricing will be essential to incentivize demand for low-carbon vehicles and fuels, and to drive innovation in further developing these technologies.'

The plans for the congestion charge to be weighted according to carbon emissions emerged in September 2006 and are expected to be introduced within the next two years. The fee for driving into central London will be variable according to the excise duty band of the vehicle.

a bill seeking to expand renewable

the growing demand for biofuels could lead to a shortage of food. Studies show biofuel plantations will eat up cropland, and trigger food and water crisis in many parts of the globe, especially

london has decided to impose stricter standards for polluting vehicles. Under the low emission zones (lez) programme coming into effect on February 4, 2008, lorry, bus and other coaches can be

The us and Brazil, which account for more than 72 per cent of global ethanol production, recently finalised a pact to jointly research biofuels and develop standards for their global