ClimateWire: Canadian Prime Minister Justin Trudeau (center), Mexican President Enrique Pea Nieto (left) and President Obama take part in the North American Leaders' Summit at the National Gallery of Canada in Ottawa, Ontario, yesterday. North America's energy politics got a little more intertwined yesterday as President Obama, Canadian Prime Minister Justin Trudeau and Mexican President Enrique Pea Nieto agreed to green the continent's power and petroleum sectors and present a joint front across a range of...