Nenets children rest in a Nenets' traditional tent on the Yamal peninsula, north of the polar circle, August 4, 2009. The Nenets tribespeople of Russia's frozen Yamal peninsula have survived the age of the Tsars, the Bolshevik revolution and the chaotic 1990s, but now confront their biggest challenge -- under their fur-bundled feet is enough gas to heat the world for five years. Picture taken August 4, 2009. TO MATCH FEATURE RUSSIA-YAMAL/NENETS REUTERS/Denis Sinyakov (RUSSIA ENVIRONMENT SOCIETY IMAGES OF THE DAY)