kazim kazanlnliev runs sevevel shop en in n thsummer, , 's minus 15 degrees celusus in hiicee cecellarbecause ththe town is soso rem, food supplies can be a problem here. that makes permafrost refrigerators like this one practical. >> here we've got sunfwewerseed oi potatato ips, andndanned meat. >> kazim s says he couldld ste some produducts here foror upo two years without th g going bad. but he's s had to take e e precautionons this summemer duo the record h heat. >> h having a refrfrigerator iss expepensive for anan entrepren. upkeep a andll that.t. and here, nature keeps things cold in n the permafrost. we closed thehe clar off f with these sheets s so the woululdnt be any heat loss. the temperature in here went up by one or two degrees this year. but the change isn't critical. it's bearable. >>>> but the chahange coulbebee critical soooon ough. buildings in yakutia usually stand on stilts designed to drive down into the permafrost and give houses a solid base. that means rising temperatures could soon threaten the very foundations of m many villages and citities here. increasingl