Quirks & Quarks host Bob McDonald spoke with University of British Columbia oceanographer Philippe Tortell about his new book, Earth 2020: An Insider's Guide to a Rapidly Changing Planet — a collection of essays examining how our understanding of the environment has changed in the last half century, and a better path forward for our planet. #EarthDay #EarthDay50 Listen to the full interview from CBC Radio: https://www.cbc.ca/1.5534509 | CBC