几十年来，加拿大努力成为环境问题中的环保巨头。
For several decades, Canada managed to present itself as the friendly giant of environmental issues.
如果仅就环境状况进行排名，加拿大的卡尔加里将名列第一，而城市污染严重的墨西哥城则排在了末尾。
In the environmental stakes, Calgary, Canada, finished top while pollution-choked Mexico City ranked last.
“环境问题，例如全球变暖对健康的影响，”——Krista Townsend，加拿大。
"The effects of environmental issues, such as global warming on health," — Krista Townsend, Canada.
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