ngere nwa oge America

Ngwongwo ihe owuwu nwa oge US bụ ihe mgbochi igwe nwere ike ibugharị, ejiri na mba n'ofe United States. Ọ na-ezute ụkpụrụ ihe onwunwe ASTM ma mebere ya ka ọ nagide ọnọdụ ihu igwe dị mgbagwoju anya n'ofe America, dị ka mmiri nnu n'ụsọ oké osimiri, ikpo ọkụ dị elu na South, na oké ifufe gbakwunyere snow na Midwest. A na-etinye ya na ebe a na-ewu ụlọ