Mark is a marine biologist/environmental scientist focused on the factors impacting marine mammals, such as chemical and noise pollution and the threat posed by climate change. Currently the Senior Marine Scientist for Humane Society International, he is the author/co-author of over 200 scientific papers, reports & articles. His most recent book is Whales and Dolphins: Cognition, Culture, Conservation and Human Impacts (Earthscan 2011). In 2013 he was awarded an OBE for his work.