The Green500 is the premier carbon mentoring service for large organizations based in London. Supported by the Mayor of London, the scheme aims to reduce CO2 emissions by 1.5 million tonnes by 2010 - the equivalent to a saving of around £150 million in energy bills.

The scheme provides members with practical advice and support to reduce their carbon emissions and recognises and rewards members' commitment to excellence in carbon reduction through an annual awards ceremony hosted by the Mayor of London.

For more information on Green500 please visit the website at www.green500.co.uk