August 2 was Earth Overshoot Day. Unlike Earth Day or Canada Day, it’s not a time to celebrate. As the Earth Overshoot Day website explains, it marks the time when “we will have used more from nature than our planet can renew in the whole year.” That is the definition of unsustainable and means we’re using up the biological capital that should be our children’s legacy. We would require 1.7 Earths to meet our current annual demands sustainably.