E.ON, Iberdrola, National Grid and Scottish & Southern Energy are among energy companies that have made it on to the 2010 Carbon Performance Leadership Index.

The index is published by the Carbon Disclosure Project, an organisation representing 534 global institutional investors which assesses the 500 largest global companies on their efforts to cut their carbon emissions.

The CPLI acts as a guide for investors and gives an insight into the strategies employed by a company in tackling climate change and reducing its carbon emissions.

Other energy firms that made the list were Eni, Repsol and Royal Dutch Shell while household names featured were Tesco, BMW, Toyota, Barclays, Samsung and BT. The highest scoring company of all was Siemens.

E.ON board member Klaus-Dieter Maubach: “This listing in the new Carbon Performance Leadership Index illustrates the extent to which E.ON is putting climate protection at the centre of its business activities. It is further proof that our wide energy mix, which is aimed at reducing carbon emissions and conserving resources, has put us on the right track.”