Alex Batty vanished six years ago on a family trip when he was 11. The French authorities say he had traveled with his mother and grandfather in Morocco, Spain and France as part of an itinerant spiritual community.
The U.N.’s cultural agency warns that ice sheets on Kilimanjaro, in the Dolomites and in Yosemite and Yellowstone may disappear by 2050, highlighting travel’s impact on climate change.