![Figure][1] A walker hiking a rugged trail in Israel, wearing the gas analyser mask. Photo credit: Raziel Riemer. Getting off the beaten track and out into the wild is a… Click to show full abstract
![Figure][1] A walker hiking a rugged trail in Israel, wearing the gas analyser mask. Photo credit: Raziel Riemer. Getting off the beaten track and out into the wild is a liberating experience for anyone stuck in the treadmill of city living. But Raziel Riemer, from Ben-Gurion University
               
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