科学与环境
When U.S. embassies stopped reporting air quality, pollution rose
来源: Phys.org - latest science and technology news stories · 发布于
For more than a decade, U.S. embassies and consulates provided independent, publicly available air-quality readings in cities around the world.
For more than a decade, U.S. embassies and consulates provided independent, publicly available air-quality readings in cities around the world.
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