A Greener Games? Tokyo's Environmental Impact

TOKYO - Olympics organizers have pledged to prioritize sustainability at the Tokyo Games in an attempt to demonstrate how countries such as Japan -- a top carbon emitter -- can work toward a greener future.

Their initiatives include furnishing the Olympic Village with recyclable cardboard beds, using electricity from renewable sources and minimizing waste at competitions. But like all big global events, the Games will leave an inevitable imprint on the planet. Here are some key points to know about its environmental impact: 2.73 million tonnes of CO2