{"id":6393,"date":"2018-07-31T17:11:31","date_gmt":"2018-07-31T09:11:31","guid":{"rendered":"https:\/\/smartairfilters.com\/?p=6393"},"modified":"2020-07-15T11:57:32","modified_gmt":"2020-07-15T03:57:32","slug":"chengdu-pollution-now-worse-than-beijing","status":"publish","type":"post","link":"https:\/\/smartairfilters.com\/en\/blog\/chengdu-pollution-now-worse-than-beijing\/","title":{"rendered":"Chengdu Pollution Now Worse Than Beijing"},"content":{"rendered":"

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I just analyzed Chengdu\u2019s\u00a0PM2.5 pollution<\/span><\/a>\u00a0data for the first half of 2018, and there\u2019s a surprise.<\/span><\/p>\n

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Chengdu barely edged out Beijing! Someone get those pandas a mask.<\/span><\/p>\n

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The difference is small\u20141 microgram. But it\u2019s notable because Beijing is famous for its pollution, whereas Chengdu is not. My guess is lots of folks in Chengdu would guess that Chengdu\u2019s air is better.<\/span><\/p>\n

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How Bad is That?<\/h3>\n

Is that really that bad? Here\u2019s that same graph with\u00a0the World Health Organization limit<\/a>\u00a0on top.<\/span><\/p>\n

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We\u2019re talking about serious levels here. Chengdu averages over twice the 24-hour limit of 25 micrograms. Bad days easily go to 10 times that amount.<\/span><\/p>\n

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But really we should look at the annual limit of 10 micrograms because studies show that\u00a0even levels below 25 micrograms are harmful to human health<\/a>. On that standard, Chengdu averages almost 6 times the safe limit.<\/span><\/p>\n

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Based on\u00a0a meta-analysis of the effects of air pollution<\/a>, here\u2019s where Chengdu would fall on the \u201cis killing us\u201d spectrum.<\/span><\/p>\n

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That\u2019s well into the meaty part of the curve.<\/span><\/p>\n

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How Did It Get That Bad?<\/strong><\/span><\/p>\n

But wait,\u00a0Beijing just had its best winter ever<\/a>\u00a0(on record). So is it just that Beijing got a lot better? Well Beijing did come down 14% from 2017.<\/span><\/p>\n

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And almost all of that improvement was from extraordinary measures in January that are now gone.<\/span><\/p>\n

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But Chengdu was down about the same percentage from 2017.<\/span><\/p>\n

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And almost all of Chengdu\u2019s progress was in January, like Beijing.<\/span><\/p>\n

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Thus, Chengdu was roughly in line with Beijing before this last winter.<\/span><\/p>\n

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How Does Chengdu Compare to Other Major Cities?<\/h3>\n

I analyzed PM2.5 data for 6 major cities in China going back to 2011. Chengdu has been roughly as bad as Beijing since 2016.<\/span><\/p>\n

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So if you\u2019re in Chengdu, Beijing, or elsewhere (since all of these cities are well above the limit), protect your lungs! Here are\u00a0<\/span>the three steps I take in Beijing<\/span><\/a>.<\/span><\/p>\n

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  I just analyzed Chengdu\u2019s\u00a0PM2.5 pollution\u00a0data for the first half of 2018, and there\u2019s a surprise.     Chengdu barely edged out Beijing! Someone get those pandas a mask.     The difference is small\u20141 microgram. But it\u2019s notable because Beijing is famous for its pollution, whereas Chengdu is not. … <\/p>\n

Read more<\/a><\/p>\n","protected":false},"author":1035,"featured_media":6430,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","footnotes":""},"categories":[17,257],"tags":[],"class_list":["post-6393","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-pollution","category-pm2-5","resize-featured-image"],"acf":[],"_links":{"self":[{"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts\/6393","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/users\/1035"}],"replies":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/comments?post=6393"}],"version-history":[{"count":4,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts\/6393\/revisions"}],"predecessor-version":[{"id":11544,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts\/6393\/revisions\/11544"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/media\/6430"}],"wp:attachment":[{"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/media?parent=6393"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/categories?post=6393"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/tags?post=6393"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}