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The contribution of wildfire to PM2.5 trends in the USA

Steady improvements in ambient air quality in the USA over the past several decades, in part a result of public policy1,2, have led to public health benefits1–4. However, recent trends in ambient concentrations of particulate matter with diameters less than 2.5 μm (PM2.5), a pollutant regulated under the Clean Air Act1, have stagnated or begun to reverse throughout much of the USA5. Here we use a combination of ground- and satellite-based air pollution data from 2000 to 2022 to quantify the contribution of wildfire smoke to these PM2.5 trends. We find that since at least 2016, wildfire smoke has influenced trends in average annual PM2.5 concentrations in nearly three-quarters of states in the contiguous USA, eroding about 25% of previous multi-decadal progress in reducing PM2.5 concentrations on average in those states, equivalent to 4 years of air quality progress, and more than 50% in many western states. Smoke influence on trends in the numbe ....

United States , Graphics Us Environmental Protection Agency , Us Forest Service , National Monthly , Smoke Product National Oceanic , Particulate Matter Concentrations Us Environmental Protection Agency , Discussion Paper Series Department Of Economics , Jt Development , International Emission Inventory Conference Vol , Atmospheric Administration , Trends Us Environmental Protection Agency , Us Environmental Protection Agency , Clean Air , Clean Air Act , Protection Agency , National Ambient Air Quality Standards , Particulate Matter , Wildfire Crisis , Protecting Communities , Improving Resilience , Events Guidance , Prescribed Fire , May Influence Ozone , Particulate Matter Concentrations , Annual Temperature Weighted , History Series ,

Re: Solutions Manual Advanced Engineering Electromagnetics, 2nd Edition by Constantine A. Balanis

Re: Solutions Manual Advanced Engineering Electromagnetics, 2nd Edition by Constantine A. Balanis
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