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Air pollution and visitation at U.S. national parks
Hundreds of millions of visitors travel to U.S. national parks every year to visit America’s iconic landscapes. Concerns about air quality in these areas have led to strict, yet controversial pollution control policies. We document pollution trends in U.S. national parks and estimate the relationshi...
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| 發表在: | Sci Adv |
|---|---|
| Main Authors: | , , |
| 格式: | Artigo |
| 語言: | Inglês |
| 出版: |
American Association for the Advancement of Science
2018
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| 主題: | |
| 在線閱讀: | https://ncbi.nlm.nih.gov/pmc/articles/PMC6051738/ https://ncbi.nlm.nih.gov/pubmed/30035225 https://ncbi.nlm.nih.govhttp://dx.doi.org/10.1126/sciadv.aat1613 |
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