Green groups, Sandbag and the Low Carbon Community Network (LCCN), have called upon the steelmaker ArcelorMittal – official London 2012 Olympic Supporter – to offset the carbon emissions of the 2012 Olympic Games by cancelling spare carbon allowances it received from European governments. Campaigners from Sandbag and the LCCN argue that less than 3% of the excess EU certificates the steelmaker received for free would be sufficient to make the games carbon neutral.