Andrew John Weaver, OBC, FRSC, climate scientist, leader of the BC Green Party 2015–20 (born 16 November 1961 in Victoria, BC). Andrew Weaver is a leading climate change researcher who made historic gains for the Green Party of British Columbia in his second career as a politician. In 2013, he was elected the province’s first Green MLA. In 2017, he led the Greens to three seats. After the 2017 election, he engineered a power-sharing deal with the BC New Democratic Party and toppled the Liberal government of Christy Clark to help John Horgan become premier.