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   https://doi.org/10.3390/atmos13091401  

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   In this work, we compare the air quality benefits of a variety of future policy scenarios geared towards controlling EGU (electricity generating units) emissions between the present-day conditions and 2050. While these policies are motivated by reducing CO2 emissions, they also yield significant co-benefits for criteria pollutants, such as ozone and PM2.5. An integrated set of clean energy policies were examined to assess the time-varying costs and benefits of a range of decarbonization strategies, including business as usual and the Affordable Clean Energy plan, with a primary focus on others that look to achieve very low, if not zero, CO2 emissions from the EGU sector by 2050. Benefits assessed include mitigation of greenhouse gas emissions as well as air quality co-benefits. In this introductory work, we describe the potential air quality changes from various clean air policies, to set the stage for upcoming work looking at health and monetized benefits. Emission changes for key pollutants are forecast using the Integrated Planning Model (IPM), which are then transformed into emission inputs for the Community Multiscale Air Quality Model (CMAQ). For all primary scenarios considered that achieve large greenhouse gas decreases, significant reductions in ozone and PM are realized, mainly in the eastern US, and all policies produce air quality benefits. 

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2. Approximate Hardware Techniques for Energy-Quality Scaling Across the System

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   For error-resilient applications, such as machine learning and signal processing, a significant improvement in energy efficiency can be achieved by relaxing exactness constraint on output quality. This paper presents a taxonomy of hardware techniques to exploit the trade-off between energy efficiency and quality in various computer subsystems. We classify approximate hardware techniques according to target subsystem and support for dynamic energy-quality scaling. 

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4. Just decarbonization? Environmental inequality, air quality, and the clean energy transition

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   Diana, Bridget; Ash, Michael; Boyce, James K (March 2023, Industrial and Corporate Change)

   Abstract Environmental inequalities are often large and consequential, exacerbating vertical inequalities of income and class and horizontal inequalities along lines of race and ethnicity. Climate policies can widen these inequalities as well as mitigate them, depending on their design. Decarbonization of the US electricity sector illustrates these possibilities. A strategy narrowly focused on carbon reduction alone is likely in some regions to increase disparities in exposure to localized co-pollutants emitted by fossil fuel combustion and, in some cases, to increase exposure in absolute terms. Strategies that in addition explicitly mandate improvements in air quality, both overall and specifically for frontline communities, can couple decarbonization with remediation of environmental inequalities and broad-based gains in public health. 

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5. Content-Adaptive Memory for Viewer-Aware Energy-Quality Scalable Mobile Video Systems

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