🤖 AI Summary
アメリカの46%の子供たちが危険なレベルの空気污染に曝露していると、最近の報告で指摘されました。この問題を評価するため、アメリカ肺腫協会(ALA)は27回目の年間空気質報告書を発表しました。報告によると、米国の3,350万人以上の子供たち(18歳未満の人口の46%)が少なくとも一つの汚染指標でFランクを受けた地域に住んでいます。また、700万万人(全子供の10%)は全ての指標でFランクを受ける地域に居住しています。
報告によると、非白人人口は全米人口の42.1%ですが、少なくとも一つの汚染指標でFランクを受けた郡に住む人々は54.2%を占めています。さらに、非白人の人は白人と比較して、全ての汚染指標でFランクを受けた地域に住む確率が2.42倍高いことが明らかになりました。
報告によれば、オゾン濃度(スモッグ)は最も広く蔓延した汚染物質であり、2022年から2024年にかけて、約1億2910万人のアメリカ人がその健康に影響を受けるリスクがあったとされています。これは過去6年間で最高数です。
報告書は、極端な暑さ、乾燥、森林火災が人口の一部を有害なオゾンに曝露していることも指摘しています。また、温暖化による気候変動もオゾン汚染を増加させる要因の一つとされています。
さらに、データセンターからの排出物も増えているとして報告されています。これらの施設は化石燃料がまだ大量生産源となっている地域の電力ネットワークに依存しており、多くのデータセンタは大排気量ディーゼル発電機を使用しており、 carcinogenic 部分物質を排出しています。
アメリカ肺腫協会の副事務局長、ウィル・バークレット氏によると、「子供たちはまだ肺が発達中で、体型に対してより多くの空気を吸入します。また、子供たちは外で遊ぶことが多いので、屋外の空気中の汚染物質への曝露は長期的な肺の発育上の損傷やアスマの新規症例、呼吸器疾患のリスク上昇など、後々の健康上の懸念につながります。」と述べています。
An anonymous reader quotes a report from the Guardian: Nearly half of children in the United States are breathing dangerous levels of air pollution, according to a new report, as experts warned Donald Trump's expansive rollback of protections will make the situation worse. The 27th annual air quality report from the American Lung Association (ALA) released on Wednesday evaluates pollution across the country by grading levels of ground-level ozone -- also known as smog -- as well as year-round and short-term spikes in particle pollution, commonly referred to as soot. The report analyzed quality-assured data collected between 2022 and 2024. It found that 33.5 million children in the US -- 46% of those under 18 -- live in areas that received a failing grade for at least one measure of air pollution. The report also found that 7 million children, or 10% of all children in the US, live in communities that failed all three measures.
The report further found that communities of color are disproportionately exposed to unhealthy air. As a result, they are more likely to live with one or more chronic health conditions that make them more vulnerable to pollution, including asthma, diabetes, and heart disease. Although people of color make up 42.1% of the US population, they represent 54.2% of those living in counties with at least one failing grade, the report noted. It also found that a person of color is 2.42 times more likely than a white person to live in a community that fails all three pollution measures. Smog remains the most widespread pollutant affecting Americans' health. Between 2022 and 2024, 38% of the US population -- approximately 129.1 million people -- were exposed to ozone levels that put their health at risk. This marks the highest number recorded in the ALA's report in six years, and a 3.9 million increase from the previous year.
Several factors contributed to these unhealthy pollution levels, including extreme heat, drought and wildfires which have exposed a growing share of the population to harmful ozone, the report said. The regions most affected by high ozone levels include south-western states from California to Texas, as well as much of the midwest. This is mainly driven by smoke from Canada's 2023 wildfires crossing into the US, along with high temperatures and weather patterns that favored ozone formation in 2023 and 2024 -- particularly in southern states. More broadly, the report found that climate change is intensifying ozone pollution by boosting precursor emissions and creating atmospheric conditions such as higher temperatures and lower wind speeds that allow pollutants to build up and ozone to form. Another growing source of pollution: datacenters. The report notes how they rely on regional electricity grids where fossil fuels like methane gas and coal still account for a large portion of generation. Many datacenters also use dozens of large diesel-powered backup generators, which emit carcinogenic particulate matter.
"Children's lungs are still developing," said Will Barrett, assistant vice-president of the ALA's Nationwide Clean Air Policy. "For their body size, they're breathing more air. And also, kids play outdoors, they're more active, they're breathing in more outdoor air [...]. So, air pollution exposure in children can contribute to long-term developmental harm to their lungs, new cases of asthma, increased risks of respiratory illness and other health considerations later in life."
Read more of this story at Slashdot.