{"id":18148,"date":"2024-05-13T16:30:04","date_gmt":"2024-05-13T14:30:04","guid":{"rendered":"https:\/\/thesmartcityjournal.cibeles.net\/sin-categoria\/scientists-develop-framework-to-measure-plastic-emissions\/"},"modified":"2024-11-20T12:25:52","modified_gmt":"2024-11-20T11:25:52","slug":"scientists-develop-framework-to-measure-plastic-emissions","status":"publish","type":"post","link":"https:\/\/www.thesmartcityjournal.com\/en\/climate-change\/scientists-develop-framework-to-measure-plastic-emissions","title":{"rendered":"Scientists develop framework to measure plastic emissions"},"content":{"rendered":"

A model developed by researchers at U of T and the Rochester Institute of Technology suggests that Toronto emitted nearly 4,000 tonnes of plastic pollution in one year alone<\/p>\n

Researchers at the University of Toronto have developed a framework for measuring plastic pollution emissions \u2013 not unlike the global standard for measuring greenhouse gas emissions.<\/p>\n

They say the approach will boost identification of the biggest contributors to plastic pollution from local to national levels and improve strategies in reducing emissions worldwide.<\/p>\n

Using Toronto as a model, the first-of-its-kind framework suggests that, in one year alone, Canada\u2019s largest city emitted nearly 4,000 tonnes of plastic pollution.<\/p>\n

\u201cThat\u2019s roughly 400 garbage trucks\u2019 worth of plastic that leaks into the environment annually from across the city,\u201d said Alice (Xia) Zhu<\/strong>, lead author of a study outlining the method<\/a> published in Environmental Science & Technology<\/em><\/a>.<\/p>\n

\u201cAssigning responsibility for the pollution to a jurisdiction with the ability to enact laws means there is no hiding where the pollution came from. It presents an opportunity to identify major sources of plastic pollution within the area and inform measures to curb these emissions.\u201d<\/p>\n

A PhD candidate in the department of physical and environmental sciences at U of T Scarborough who is working with Assistant Professor Chelsea Rochman<\/strong> in U of T\u2019s department of ecology and evolutionary biology in the Faculty of Arts & Science, Zhu developed the framework with colleagues at U of T and the Rochester Institute of Technology. The researchers took inspiration from guidelines for compiling emissions inventories of greenhouse gases established by the United Nations\u2019 Intergovernmental Panel on Climate Change. Adapting for physical differences between greenhouse gases and solid pieces of plastic, the researchers used a similar methodology of identifying the major pollution-generating activities in a particular area, calculating the amount of pollution generated by each activity within a given period and accounting for uncertainties associated with each source of pollution-generating activity.<\/p>\n

The framework arrives ahead of international discussions in Ottawa<\/a>, from April 23 to 29, towards a legally binding global agreement on plastic pollution. The discussions are being led by the UN\u2019s Intergovernmental Negotiating Committee on Plastic Pollution.<\/p>\n

\u201cOur goal was to develop an accounting mechanism or tool for measuring plastic emissions that any level of government can adopt,\u201d said Zhu. \u201cBut most importantly, we hope this tool we have introduced will allow the plastic field to follow in the footsteps of the climate field, where countries submit national emissions inventories to an international body such as the United Nations to track our progress towards reaching a globally defined target.\u201d<\/p>\n

Currently, national emissions inventories of plastic pollution do not exist, nor does a globally defined target for reducing plastic pollution.<\/p>\n

To demonstrate the utility of the framework, the researchers built an emissions inventory of plastic pollution for the City of Toronto for the year 2020 that draws from publicly available data gathered through municipal litter audits and other sources. From a list of nine types of sources \u2013 including littering, tire dust from airplanes and on-road vehicles, washing machines and paint from road markings and the exteriors of houses \u2013 they estimated between 3,531 and 3,852 tonnes of plastic pollution were emitted from within the city\u2019s boundaries during the period.<\/p>\n

Littering made up the largest share of the total at 3,099 tonnes, while artificial turf was responsible for the most emissions of microplastics \u2013 particles less than five millimetres in diameter \u2013 at 237 tonnes.<\/p>\n

\u201cIt is not surprising that larger materials \u2013 known as macroplastics, and in this case from mismanaged waste such as littering \u2013 made up the majority of the mass. But it overshadows the small stuff: microplastics,\u201d said Rochman, a co-author of the study and Zhu\u2019s PhD supervisor. \u201cMicroplastics tend to be the highest by count in terms of actual pieces. This suggests that policies relevant to microplastics, in addition to macroplastics, are critical to reduce plastic emissions in the City of Toronto.\u201d<\/p>\n

The researchers selected Toronto to test the framework since it is the largest city in Canada and the fourth-largest city in North America.<\/p>\n

\u201cIt\u2019s an urban hub for various activities \u2013 and where you have lots of people and activity, you inevitably generate a lot of pollution,\u201d said Zhu. \u201cFor a successful and informative case study, you want to look at a place with a lot of different sources of pollution. By doing so, you can identify which sources should be prioritized for the reduction of pollution out of all the others, and thereby demonstrate the utility of an emissions inventory for informing local policy.\u201d<\/p>\n

Zhu said emissions inventories of plastic pollution must be a foundational piece of a successful global treaty on plastic, and that the framework should be applied to other cities, provinces and states, and countries around the world to better understand what kinds of plastic pollution are being released into the environment.<\/p>\n

\u201cThe guidelines can be applied to regions worldwide, regardless of what kinds of sources are there,\u201d Zhu said. \u201cEach geographic region will have different characteristics and the inventory will allow for the development of solutions tailored to that specific region.\u201d<\/p>\n

Source: By Sean Bettam<\/strong><\/a> (https:\/\/www.utoronto.ca\/news\/<\/a>)<\/p>\n

Image: Paint peeling from buildings and road markings are significant sources of microplastic pollution (photo courtesy of U of T Trash Team)<\/em><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

A model developed by researchers at U of T and the Rochester Institute of Technology suggests that Toronto emitted nearly 4,000 tonnes of plastic pollution in one year alone Researchers at the University of Toronto have developed a framework for measuring plastic pollution emissions \u2013 not unlike the global standard for measuring greenhouse gas emissions.\u2026<\/p>\n","protected":false},"author":2,"featured_media":18147,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_scj_primary_category_id":70,"_scj_featured":false,"_scj_featured_from":"","_scj_featured_until":"","_scj_featured_order":0,"_scj_visibility_class":"current","_scj_layout_family":"standard","_scj_article_style":"","_scj_display_overrides":[],"_scj_intro_image_id":18147,"_scj_intro_alt":"Scientists develop framework to measure plastic emissions","_scj_intro_caption":"","_scj_intro_class":"","_scj_intro_float":"","_scj_full_image_id":18147,"_scj_full_alt":"Scientists develop framework to measure plastic emissions","_scj_full_caption":"","_scj_full_class":"","_scj_full_float":"","_scj_media_type":"","_scj_media_provider":"","_scj_media_external_id":"","_scj_media_url":"","_scj_media_poster_id":0,"_scj_media_width":0,"_scj_media_height":0,"_scj_media_aspect_ratio":"","_scj_media_description":"","_scj_gallery_items":[],"_scj_related_post_ids":[],"_scj_additional_authors":[],"scj_layout_family":"standard","scj_media_provider":"","scj_media_url":"","scj_full_caption":"","footnotes":""},"categories":[70],"tags":[],"class_list":["post-18148","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climate-change"],"yoast_head":"\nScientists develop framework to measure plastic emissions - thesmartcityjournal.com<\/title>\n<meta name=\"description\" content=\"Researchers at the University of Toronto have developed a framework for measuring plastic pollution emissions \u2013 not unlike the global standard for measuring greenhouse gas emissions. 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