I’m about to head off on another international reporting trip, this time to Peru’s Cordillera Blanca, where the receding glaciers are quickly changing the landscape. This is an economic story, not just an environmental one — tourism is the third largest industry in Peru, behind mining and resource extraction, and in many areas the snowcapped mountains are the primary draw. That is true of the Ancash region, where Peru’s highest mountain range sits. Tourism has been a crucial part of the economy there, but as the glaciers melt that is changing things. I’m going down there to meet with the people affected, from the restaurant owners to the mountain guides. I made connections when I was there several years ago, and now this tim I’m going to tell the story.