May 20, 2011. The environmentally friendly credentials of London's 2012 Olympic venues are already fuelling "greener" building in Britain and will influence future global events, said the Olympic Development Authority. In a promise to deliver the 'greenest ever' Olympic Games, sustainability was at the heart of London's bid. The sustainability practices, such as innovation around waste management and water efficiency savings through treating sewage water, developed at the 2.5 square kilometer site in East London will also be the blueprint for future Olympic sites. Russia and Brazil are looking to London's ODA for advice on designs focused around sustainability in preparation for the 2014 Winter Olympics in Sochi amongst other events. Brazil is planning more than $1 trillion in construction projects this decade ahead of the 2014 World Cup and 2016 Olympics. In a recent sustainability report, London's ODA said that it had met nearly all of the "green" targets, particularly around carbon emissions and water usage. Best practices have also being shared with other major UK infrastructure projects such as the 15 billion pound Crossrail commuter rail line to be built under London's streets. Construction of the London Olympic venues and infrastructure is 83 percent complete, with the 43 million pound handball arena becoming the third venue on the park to be completed. Crowd pleasers such as the Velodrome, with its design using sustainably-sourced timber also boasts the title of the most energy-efficient venue on the Park. However, one of the biggest stumbling blocks for the ODA was meeting its renewable target, after plans to build a 120-meter wind turbine were abandoned last year. But other green attributes of the site include two million tonnes of contaminated soil being cleaned prior to construction, and 99 percent of the old industrial buildings being reused or recycled. Even venues such as the basketball arena will effectively be recycled, with each panel a standard size so it can go back into the market to be resold. The main stadium design includes recycled utility pipe in the upper roof, designed by the contractors after being asked to incorporate 20 percent recycled material. The Olympic Park site is due to be delivered on time and within budget. The overall cost remains within the 9.3 billion pound budget, including contingency.