{"id":566631,"date":"2010-05-17T08:54:23","date_gmt":"2010-05-17T12:54:23","guid":{"rendered":"http:\/\/www.earthportal.org\/news\/?p=3335"},"modified":"2010-05-17T08:54:23","modified_gmt":"2010-05-17T12:54:23","slug":"nitrous-oxide-now-top-ozone-depleting-emission","status":"publish","type":"post","link":"https:\/\/mereja.media\/index\/566631","title":{"rendered":"Nitrous Oxide now top ozone-depleting emission"},"content":{"rendered":"<p><a href=\"http:\/\/www.sciencedaily.com\/releases\/2009\/08\/090827141344.htm\">Science Daily:<\/a> Nitrous oxide has now become the largest ozone-depleting substance  emitted through human activities, and is expected to remain the largest  throughout the 21st century, NOAA scientists say in a new study.<\/p>\n<p><a href=\"http:\/\/www.sciencedaily.com\/releases\/2009\/08\/090827141344.htm\" ><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.sciencedaily.com\/images\/2009\/08\/090827141344.jpg\" align=\"right\" width=\"283\" height=\"161\" \/><\/a>For the first time, this study has evaluated nitrous oxide emissions  from human activities in terms of their potential impact on Earth&#8217;s  ozone layer. As chlorofluorocarbons (CFCs), which have been phased out  by international agreement, ebb in the atmosphere, nitrous oxide will  remain a significant ozone-destroyer, the study found. Today, nitrous  oxide emissions from human activities are more than twice as high as the  next leading ozone-depleting gas.<\/p>\n<p>Nitrous oxide is emitted from natural sources and as a byproduct of  agricultural fertilization and other industrial processes. Calculating  the effect on the ozone layer now and in the future, NOAA researchers  found that emissions of nitrous oxide from human activities erode the  ozone layer and will continue to do so for many decades.<\/p>\n<p>The study, authored by A.R. Ravishankara, J.S. Daniel and Robert W.  Portmann of the NOAA Earth System Research Laboratory (ESRL) chemical  sciences division, appears online today in the journal Science. ESRL  tracks the thickness of the ozone layer, as well as the burden of  ozone-depleting compounds in the atmosphere. It maintains a large  portion of the world air sampling and measurement network. NOAA  scientists also conduct fundamental studies of the atmosphere and  atmospheric processes to improve understanding of ozone depletion and of  the potential for recovery the ozone layer.<\/p>\n<p>&#8220;The dramatic reduction in CFCs over the last 20 years is an  environmental success story. But manmade nitrous oxide is now the  elephant in the room among ozone-depleting substances,&#8221; said  Ravishankara, lead author of the study and director of the ESRL Chemical  Sciences Division in Boulder, Colo.<\/p>\n<p><a href=\"http:\/\/www.sciencedaily.com\/releases\/2009\/08\/090827141344.htm\">Read more&gt;&gt; <\/a><\/p>\n<p class=\"akst_link\"><a href=\"http:\/\/www.earthportal.org\/news\/?p=3335&amp;akst_action=share-this\"  title=\"E-mail this, post to del.icio.us, etc.\" id=\"akst_link_3335\" class=\"akst_share_link\" rel=\"nofollow\">Share This<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Science Daily: Nitrous oxide has now become the largest ozone-depleting substance emitted through human activities, and is expected to remain the largest throughout the 21st century, NOAA scientists say in a new study. For the first time, this study has evaluated nitrous oxide emissions from human activities in terms of their potential impact on Earth&#8217;s [&hellip;]<\/p>\n","protected":false},"author":7025,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-566631","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts\/566631","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/users\/7025"}],"replies":[{"embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/comments?post=566631"}],"version-history":[{"count":0,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts\/566631\/revisions"}],"wp:attachment":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/media?parent=566631"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/categories?post=566631"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/tags?post=566631"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}