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EPA proposes retaining current NAAQS for particulate matter

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concentrations in the US fell by 39% between 2000 and 2018 while average PM 10 concentrations fell by 31% during the same period. EPA is proposing that the current secondary standards are adequate to protect against PM-related visibility impairment, climate effects, and effects on materials. Average PM 2.5

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EPA report to Congress finds a strong scientific and technical foundation for mitigating black carbon emissions

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The US Environmental Protection Agency (EPA) has submitted its final Report to Congress on Black Carbon , in response to an October 2009 request from Congress to advance efforts to understand the role of black carbon (BC) in climate change. —Report to Congress on Black Carbon. Source: EPA. Click to enlarge. Source: EPA.

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Study Finds On-Road Transportation Sector the Greatest Net Contributor to Atmospheric Warming Now and in Mid-Term; Power Sector Takes the Lead by 2050

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Radiative forcing due to perpetual constant year 2000 emissions grouped by sector for 2020 (left) and 2100 (right) showing the contribution from each species. We wanted to provide the information in a way that would be more helpful for policy makers. The net sum of total radiative forcing is indicated by the title of each bar.

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New study finds asthma morbidity in children is enhanced in areas with high traffic-related air pollution near the home

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While numerous studies have linked fine particulate pollution (PM 2.5 ) exposures to respiratory illnesses, including asthma, there is a lack of information about the health effects of exposure to particulate pollution from different sources. —Delfino et.al. for future control measures.

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