read at TreeHugger:
"Wal Mart Mexico is getting in on the act, launching a 174kw solar array on top of Bodega Aurrera Aguascalientes, one of its stores.
While nowhere near the size of many recent record breaking solar projects elsewhere, (the largest solar roof in the world being GM's 12MW system in Spain), the array is apparently the largest solar array in Latin America. Whether or not we compare it to international records, it is still a major step forward, and a step forward that may encourage the kind of 'solar arms race' we've been seeing elsewhere in the world, with new projects getting bigger all the time. Encouragingly this project is being billed as just a beginning for Wal Mart Mexico."