Where do you study? analytical paper on beowulf The study is a first attempt to quantify the health costs of air pollution in the country using data sourced from China. Previous research had relied on extrapolations from pollution levels in other countries. 必須 2000文字以内 [bbs:youtube:(Youtubeの動画ID)]と書くとYoutubeの動画が貼れます。(例:[bbs:youtube:OQThUAQ0UN0])