北京公共卫生环境还存在一些问题。
There are still some problems with Beijing's public hygienic environment.
大约有10亿人仍旧没有充足的水供给。然而还有一些人遭受着洪水，水污染以及恶劣的公共卫生环境的威胁。
About 1 billion people are still without access to a decent water supply, while others suffer from flooding, pollution and poor sanitation.
约翰霍普金斯大学布隆伯格公共卫生学院的社会流行病学家托马斯·格拉斯说：“大多数专家都认为这些变化与环境有关。”
"Most experts agree that the changes were related to something in the environment," says social epidemiologist Thomas Glass of The Johns Hopkins Bloomberg School of Public Health.
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