https://www.earthmagazine.org/tags/milagro/ Recent content in Milagro on EARTH Magazine Hugo en-US American Geosciences Institute. All rights reserved. Thu, 05 Jan 2012 06:41:58 -0500 https://www.earthmagazine.org/article/air-pollutants-megacities-growing-problem/ Thu, 05 Jan 2012 06:41:58 -0500 https://www.earthmagazine.org/article/air-pollutants-megacities-growing-problem/ <figure class="earth-figure"> <img src="https://www.americangeosciences.org/static/earth/air-pollutants-megacities-growing-problem/i-24d-7d9-8-15.jpg" alt="Researchers in a mobile air quality research lab, with a rare morning view of Mexico City not covered in smog. Charles Kolb, Aerodyne Research Inc." loading="eager" decoding="async"> <figcaption>Researchers in a mobile air quality research lab, with a rare morning view of Mexico City not covered in smog. Charles Kolb, Aerodyne Research Inc.</figcaption> </figure> <p>Megacities &mdash; cities with populations equaling or greater than 10 million people &mdash; are producing an unprecedented amount of air pollution, according to scientists at the <a href="http://portal.acs.org/portal/acs/corg/content?_nfpb=true&amp;_pageLabel=PP_TRANSITIONMAIN&amp;node_id=2053&amp;use_sec=false&amp;sec_url_var=region1&amp;__uuid=95edd027-6333-4546-afbf-7bbcf38a78b3">American Chemical Society's annual meeting</a> in Washington, D.C., on Tuesday.</p>