Ahead of the UN Climate Action Summit in New York, IOC-supported Olympic champion and environmentalist Hannah Mills spoke at the UN Youth Climate Summit, highlighting the power of sport to help the world address climate change.

Rio 2016 sailing gold medallist Hannah Mills has launched the Big Plastic Pledge – a global campaign to unite athletes and fans around the issue of plastic pollution. The campaign is supported by the International Olympic Committee (IOC), as part of its commitment to the UN Clean Seas initiative.

London 2012 - Hannah Miley, who won silver at last year’s World Championships, was unable to reach the podium for Britain in the 400m individual medley.

Hannah Teter of United States, performs powerfully to take the snowboard half-pipe gold medal. Scoring 44.6 in her first run and 46.4 in her second, Teter wins her first Olympic title. American Gretchen Bleiler secures the silver medal and Norwegian Kjersti Buaas takes the bronze medal home. Snowboard Half-pipe Women's Final - Turin 2006 Winter Olympics - Hannah Teter (USA), Gretchen Bleiler (USA), Kjersti Buaas (NOR)

In the half-pipe final, American Hannah Teter proves to be a golden girl by winning her first Olympic title at 19 years of age. Teter scores 44.6 and 46.4 in her first and second runs to achieve Olympic glory. The silver medal is received by compatriot Gretchen Bleiler. Kjersti Buaas of Norway claims the bronze medal. Snowboard Half-pipe Women's Final - Turin 2006 Winter Olympics - Hannah Teter (USA), Gretchen Bleiler (USA), Kjersti Buaas (NOR)