When London was chosen to host the 2012 Olympics, they committed to making it the greenest games ever. Venues and the Olympic Park in Stratford were designed and built with sustainable materials. Stratford was regenerated from abandoned industry to parks. Authorities encouraged active travel like walking and cycling. Londoners were also urged to recycle and conserve resources. The games aimed to optimize positive environmental impacts while minimizing negatives, and leave a legacy of sustainability and healthy living.