{"id":546417,"date":"2025-05-09T15:06:20","date_gmt":"2025-05-09T18:06:20","guid":{"rendered":"https:\/\/revistapesquisa.fapesp.br\/?p=546417"},"modified":"2025-05-09T16:11:36","modified_gmt":"2025-05-09T19:11:36","slug":"for-five-days-sao-paulo-had-the-worst-air-in-the-world","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/for-five-days-sao-paulo-had-the-worst-air-in-the-world\/","title":{"rendered":"For five days, S\u00e3o Paulo had the worst air in the world"},"content":{"rendered":"<div id=\"attachment_546418\" style=\"max-width: 1150px\" class=\"wp-caption alignright vertical\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-546418 size-full\" src=\"https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2025\/03\/rpf-notas-poluicao-09-2024-1140.jpg\" alt=\"\" width=\"1140\" height=\"646\" srcset=\"https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2025\/03\/rpf-notas-poluicao-09-2024-1140.jpg 1140w, https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2025\/03\/rpf-notas-poluicao-09-2024-1140-250x142.jpg 250w, https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2025\/03\/rpf-notas-poluicao-09-2024-1140-700x397.jpg 700w, https:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2025\/03\/rpf-notas-poluicao-09-2024-1140-120x68.jpg 120w\" sizes=\"auto, (max-width: 1140px) 100vw, 1140px\" \/><p class=\"wp-caption-text\"><span class=\"media-credits-inline\">L\u00e9o Ramos Chaves\u2009\/\u2009Pesquisa FAPESP<\/span>The sky over S\u00e3o Paulo in September<span class=\"media-credits\">L\u00e9o Ramos Chaves\u2009\/\u2009Pesquisa FAPESP<\/span><\/p><\/div>\n<p>Of 120 metropolises around the world, S\u00e3o Paulo\u2019s air quality was ranked the worst for five consecutive days between September 9 and 13, according to the Swiss website IQAir. Brazil&#8217;s largest city was extremely dry at the time, and the sky was filled with smoke from wildfires burning across the country, including in the Amazon and the Pantanal, as well as in S\u00e3o Paulo State itself. The air quality was considered unhealthy at various times during these days, exceeding 150 points on IQAir\u2019s air quality index. The site updates its ranking of the average air quality in the cities it monitors in real time\u2014usually every hour. The index is based on an average of the information provided by air pollution measuring stations installed in the cities. The pollutant it used as a reference is inhalable fine particles of up to 2.5 micrometers (MP<sub>2.5<\/sub>), which remain suspended in the air for a long time and can be absorbed by the human body, causing health problems. They originate from burning fossil fuels, forest fires, and the combustion of vegetation. The index is managed by a company that produces air treatment equipment (IQAir) in partnership with nongovernmental organizations, such as the environmental group Greenpeace, and the United Nations Environment Program (UNEP) and Human Settlements Program (UN-Habitat).<\/p>\n","protected":false},"excerpt":{"rendered":"For five consecutive days in September, S\u00e3o Paulo had the worst air in the world","protected":false},"author":475,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[1651],"tags":[200,260],"coauthors":[785],"class_list":["post-546417","post","type-post","status-publish","format-standard","hentry","category-notes","tag-environment","tag-public-health"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/546417","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/475"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=546417"}],"version-history":[{"count":1,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/546417\/revisions"}],"predecessor-version":[{"id":546426,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/546417\/revisions\/546426"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=546417"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=546417"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=546417"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=546417"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}