Canadian wildlife photographer Jason Bantle commemorated this year's Earth Day with a new release: an image of a polar bear - in black and white.
"I did ti because I see the environmental issues of the North as black and white,"explains Bantle, whose portfolio features numerous photographs of Arctic wildlife, including polar bears.
"Either we act now, or we don't. Either you are doing what you can to convince those in authority to protect our natural legacy, or you are not."