In August 2010, Grylls continued his fund-raising work for Global Angels by undertaking an expedition through the Northwest Passage in a rigid inflatable boat. Many of his expeditions also support environmental causes such as his Antarctica expedition and his circumnavigation of Britain which tested a pioneering new fuel made from rubbish. In 2011, Grylls was in New Zealand during the February 2011 Christchurch earthquake. Following the incident, he appeared on New Zealand advertisements encouraging people to donate money to help rebuild the city.