Conversation so far:
What is Paul Watson's biggest environmental achievement?
Paul Watson received the Jules Verne Award on October 10, 2012. He was the second person, after Captain Jacques Cousteau, awarded a Jules Verne Award dedicated to environmentalists and adventurers
What else did Paul Watson achieve environmentally besides his Jules Verne Award?
Paul Watson also was a co-founder of Friends of the Wolf and Earthforce Environmental Society.
Did Paul Watson achieve anything else environmentally besides the Jules Verne Award and co-founding the Friends of the Wolf and Earthforce Environmental Society?
During the 1980s, Paul Watson declared his support for Earth First! and cultivated friendships with David Foreman and Edward Abbey, proclaiming Sea Shepherd to be the navy of Earth First!
Can you tell me about any further achievements environmentally of Paul Watson besides his Jules Verne Award, co-founding the Friends of the Wolf and Earthfroce Environmental Society, and declaring his support for Earth First!?
Paul Watson ran as an independent candidate in the 1980 Canadian Federal election in Vancouver Centre, proclaiming he wasn't a politician but an environmentalist.
Did Paul Watson win the 1980 Canadian Federal election?
Paul Watson received fewer than 100 votes.
What did Paul Watson do after the 1980 Canadian Federal election?
Paul Watson did work with the Green Party of British Columbia in Vancouver in the 1980s and 90s. He ran for mayor in 1996, placing fourth.
Did Paul Watson ever hold political office?
In April 2003, Paul Watson was elected to the board of directors of the Sierra Club for a three-year term.

Question: What did he do there?
Self-contained rewrite: What did Paul Watson do on the board of directors of the Sierra Club?