Concrete is widely used in the Olympic Park and Olympic and Paralympic Village. Its specification and use provided an opportunity to reduce embodied carbon emissions involved in the construction of facilities and infrastructure, and to influence the overall carbon footprint of the London 2012 Games. This report sets out the evidence on concrete supply to the Olympic Park and the Olympic and Paralympic Village and the lessons learned from using sustainable concretes, and examines the estimated carbon footprints. Case studies of the Aquatics Centre and the Olympic and Paralympic Village are included.