'This is an incredibly cheerful and celebratory day, and you’ve picked as your speaker someone whose most famous book has the title ‘The End of Nature.’ There are moments when I think my role in the world is essentially to be a professional bummer-outer. ...
'We’re here at the 50th Eckerd commencement — if we don’t get it right, the 100th commencement won’t be right here because this will be underwater.'
Bill McKibben, environment activist
writer and co-founder of 350.org
St. Petersburg, Florida