InsideClimate: President Obama hopes his three-day tour of Alaska this week highlights the devastating impacts of climate change in the Arctic, even though it comes just two weeks after he approved a permit for Shell to drill for oil in the Chukchi Sea. That move has generated ire from many environmentalists who see this trip as hypocritical. But the conflicting actions demonstrate the grey area Obama is attempting to navigate around climate change: He is fighting for global warming action, particularly in the...