Ibu ụzọ dị mkpa

Itinye njikwa na njikwa nke onye ọrụ, igwe, akụrụngwa, usoro, gburugburu ebe obibi na mmụba maka ọrụ bara uru, WRN na-ewepụta usoro njikwa njikwa zuru oke, na-arụsi ọrụ ike na-akwalite nsị na-emepụta ma na-ewulite ụlọ ọrụ atụkwasị obi.

WRN-Institute-of-LivableAir

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