渥太华过敏一样特别多。现在中国过敏哮喘特别多,污染罪魁祸首
渥太华过敏一样特别多。
中国的看得见, 这里的无形:
When Lyndsay Kovacs learned of the link between radon gas exposure in basements and lung cancer, the Kanata mother was quick to get her house tested given the lower level is a regular play area for her three kids.
http://ottawacitizen.com/news/local-news/one-in-20-ontario-homes-contain-lethal-levels-of-radon-gas
一直搞不明白为啥加拿大人喜欢把地下室装修成家里的主要活动场所