{"id":9762,"date":"2020-03-05T23:16:41","date_gmt":"2020-03-05T15:16:41","guid":{"rendered":"https:\/\/smartairfilters.com\/?p=9762"},"modified":"2020-07-15T11:58:44","modified_gmt":"2020-07-15T03:58:44","slug":"beijing-pm25-air-pollution-increase-coronavirus","status":"publish","type":"post","link":"https:\/\/smartairfilters.com\/en\/blog\/beijing-pm25-air-pollution-increase-coronavirus\/","title":{"rendered":"Believe It or Not: Beijing Sees Worse Pollution During Coronavirus Shutdown"},"content":{"rendered":"

Recent news reports have proclaimed a dramatic reduction in China\u2019s air pollution during the coronavirus lockdown<\/a>, yet data shows Beijing has actually seen pollution levels rise during this period. The headlines are based on images from NASA<\/a>, finding that air pollution dropped 10-30% compared to the same period in 2019.<\/p>\n

\"Beijing<\/p>\n

 <\/p>\n

NO2 Pollution During Coronavirus Down 10-30% Over Prior Year<\/h3>\n

Smart Air analyzed data from the Beijing Environmental Protection Bureau, comparing 6 different pollutants for the period 2019 to 2020. In contrast, the NASA study looks only at NO2 (nitrogen dioxide). NASA estimated that NO2 fell 10-30% across the whole of China during January and February, when compared to 2019.<\/p>\n

This fits with results from our analysis. Beijing’s NO2 fell 21% compared to the same period in 2019.<\/p>\n

\"Beijing<\/p>\n

Why? The major source of NO2 is from transport<\/a> – cars, trucks and buses. The coronavirus lockdown has closed entire cities and roads, which has meant fewer cars on the road<\/a>.<\/p>\n

 <\/p>\n

Beijing PM2.5 Pollution During Coronavirus Lockdown: Up 17%<\/h3>\n

However, NO2 is only one type of air pollution. According to the World Health Organization<\/a>, particulate pollution “affects more people than any other pollutant.” For that sort of pollution, Smart Air analysis finds that PM2.5<\/a> has actually increased 17% during January and February, compared with the same period in 2019.<\/p>\n

\"Beijing<\/p>\n

So why, even with Beijing under lockdown, has PM2.5 worsened over the prior year? With less traffic on the roads – up to 77% fewer trucks and 36% fewer buses in some cases<\/a> – and hundreds of factories closed<\/a>, it is reasonable to expect decreasing pollution during the coronavirus lockdown.<\/p>\n

 <\/p>\n

    \n
  1. \n

    Heavy industry surrounding Beijing is up and running<\/h3>\n<\/li>\n<\/ol>\n

    The area surrounding Beijing is China\u2019s biggest steel manufacturing hub<\/a>.<\/p>\n

    \"Beijing<\/p>\n

    What\u2019s more, these heavy industry factories are typically state-owned enterprises that have remained open despite the coronavirus lockdown<\/a>. For example, a map of Beijing\u2019s factory activity from 2nd<\/sup> March, 2020 shows almost all factories back online, except for a few (gray) points on the map.<\/p>\n

    \"Factory<\/p>\n

    However, some factories have closed due to the coronavirus. Why, then, is PM2.5 higher than 2019?<\/p>\n

      \n
    1. \n

      Unfavorable winds in 2020<\/h3>\n<\/li>\n<\/ol>\n

      A map of winds around Beijing as of February 13th<\/sup> show stagnating air around Beijing.\"Beijing<\/p>\n

      Weaker winds and fewer northerly winds can increase PM2.5. Data shows that wind\u2014particularly northern wind<\/a>\u2014slashes PM2.5 in Beijing. Thus, less wind means fewer chances to blow away the air pollution. This, coupled with the atmospheric effect known as inversion<\/a>, could explain why Beijing’s PM2.5 has been higher during the coronavirus lockdown.<\/p>\n

      Bottom Line<\/div>
      Bottom Line: Beijing's PM2.5 Pollution During Coronavirus Lockdown<\/div>
      <\/p>\n

      Beijing\u2019s NO2 pollution has dropped during the coronavirus shutdown, but PM2.5 has increased 17%. This is critical because data has linked PM2.5 to heart attacks, strokes<\/a><\/span>, and even lower IQ<\/a><\/span>. <\/div>

      Smart Air<\/div><\/div>\n
      \n

      <\/h3>\n

      Studies Document Protective Effects of Purifiers, Masks<\/h3>\n

      Despite the harms of PM2.5, studies have found that wearing masks prevents\u00a0<\/span>effects on blood pressure and heart rate variability<\/a>. Placebo-controlled studies of air purifiers have found that reducing particulate in the home\u00a0<\/span>prevents harm to blood pressure<\/a>, inflammation, and immune response\u2014even among young,\u00a0<\/span>healthy twenty-year-olds<\/a>.<\/p>\n

      Smart Air is a certified B Corp committed to combating the myths big companies use to artificially inflate the price of clean air. To help people living in polluted cities protect themselves, Smart Air provides\u00a0<\/span>empirically backed<\/a>,\u00a0<\/span>no-nonsense purifiers and masks<\/a>, helping to lower the cost of clean air.<\/p>","protected":false},"excerpt":{"rendered":"

      Recent news reports have proclaimed a dramatic reduction in China\u2019s air pollution during the coronavirus lockdown, yet data shows Beijing has actually seen pollution levels rise during this period. The headlines are based on images from NASA, finding that air pollution dropped 10-30% compared to the same period in 2019. … <\/p>\n

      Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":9763,"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":[17,452,460,257],"tags":[75,487,466,74],"class_list":["post-9762","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-pollution","category-air-quality","category-beijing","category-pm2-5","tag-beijing","tag-covid-19","tag-no2","tag-pm2-5","resize-featured-image"],"acf":[],"_links":{"self":[{"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts\/9762","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/comments?post=9762"}],"version-history":[{"count":17,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts\/9762\/revisions"}],"predecessor-version":[{"id":11602,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/posts\/9762\/revisions\/11602"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/media\/9763"}],"wp:attachment":[{"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/media?parent=9762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/categories?post=9762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/smartairfilters.com\/en\/wp-json\/wp\/v2\/tags?post=9762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}