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<blockquote style="position: relative; padding-left: 55px;"><section><a href="https://mastodon.world/users/AJStein_de/statuses/113752649846326107">Alexander J. Stein (ajstein_de@mastodon.world)'s status on Wednesday, 01-Jan-2025 19:57:14 JST</a><a href="https://mastodon.world/@AJStein_de" title="ajstein_de@mastodon.world"><img src="https://gnusocial.jp/avatar/278558-48-20240829211924.webp" width="48" height="48" alt="Alexander J. Stein" style="position: absolute; left: 0; top: 0;">Alexander J. Stein</a><div><a href="https://mastodon.world/@AJStein_de/113752648301634555" rel="in-reply-to">in reply to</a></div></section><article><p>... and it's not even safe to step on the balcony as outdoor <a href="https://mastodon.world/tags/airpollution" rel="tag">#airpollution</a> is thru the roof. Even in a backyard surrounded by houses &amp; no own <a href="https://mastodon.world/tags/fireworks" rel="tag">#fireworks</a>, concentrations of <a href="https://mastodon.world/tags/particulatematter" rel="tag">#particulatematter</a> rise to 125 µg/m3 for <a href="https://mastodon.world/tags/PM2" rel="tag">#PM2</a>.5 (EPA's 24h-level is 35 µg/m3, its annual level is 9 µg/m3) <a href="https://mastodon.world/tags/airquality" rel="tag">#airquality</a> <a href="https://mastodon.world/tags/health" rel="tag">#health</a></p></article><footer><a rel="bookmark" href="https://gnusocial.jp/conversation/4294365#notice-8394469">In conversation</a><time datetime="2025-01-01T19:57:14+09:00" title="Wednesday, 01-Jan-2025 19:57:14 JST">about a month ago</time> <span>from <span><a href="https://mastodon.world/@AJStein_de/113752649846326107" rel="external" title="Sent from mastodon.world via ActivityPub">mastodon.world</a></span></span><a href="https://mastodon.world/@AJStein_de/113752649846326107">permalink</a><h4>Attachments</h4><ol><li><label><a rel="external" href="https://gnusocial.jp/attachment/3820454">Graph showing air pollution over 24 hours, from 10 o’clock on 31 December to 10 o’clock on 1 January. Pollution is measured as concentration of fine particles PM 2.5. Concentrations are 1-6 microgram per cubic metre, except for midnight, when they shoot up to 125 microgram per cubic metre before slowly falling again back to baseline by 4 o’clock in the morning. For context, in the US the Environmental Protection Agency set “the level of the primary (health-based) annual PM2.5 standard at 9.0 micrograms per cubic meter to provide increased public health protection, consistent with the available health science”, while it set “the 24-hour PM 2.5 standard at the level of 35 micrograms per cubic meter”: https://www.epa.gov/pm-pollution/national-ambient-air-quality-standards-naaqs-pm</a></label><br><a href="https://s3.eu-central-2.wasabisys.com/mastodonworld/media_attachments/files/113/752/648/833/401/157/original/f796cd7af2929c2d.png" rel="external">https://s3.eu-central-2.wasabisys.com/mastodonworld/media_attachments/files/113/752/648/833/401/157/original/f796cd7af2929c2d.png</a></li></ol></footer></blockquote>

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Alexander J. Stein (ajstein_de@mastodon.world)'s status on Wednesday, 01-Jan-2025 19:57:14 JST Alexander J. Stein
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... and it's not even safe to step on the balcony as outdoor #airpollution is thru the roof. Even in a backyard surrounded by houses & no own #fireworks, concentrations of #particulatematter rise to 125 µg/m3 for #PM2.5 (EPA's 24h-level is 35 µg/m3, its annual level is 9 µg/m3) #airquality #health
In conversationabout a month ago from mastodon.worldpermalink
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1. Graph showing air pollution over 24 hours, from 10 o’clock on 31 December to 10 o’clock on 1 January. Pollution is measured as concentration of fine particles PM 2.5. Concentrations are 1-6 microgram per cubic metre, except for midnight, when they shoot up to 125 microgram per cubic metre before slowly falling again back to baseline by 4 o’clock in the morning. For context, in the US the Environmental Protection Agency set “the level of the primary (health-based) annual PM2.5 standard at 9.0 micrograms per cubic meter to provide increased public health protection, consistent with the available health science”, while it set “the 24-hour PM 2.5 standard at the level of 35 micrograms per cubic meter”: https://www.epa.gov/pm-pollution/national-ambient-air-quality-standards-naaqs-pm
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