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More than 13.5 million deaths due to air pollution could be avoided by 2050 under climate action that limits global warming to 2 degrees Celsius, mostly in low and middle-income countries, according to a new study. Researchers, including those from The University of Texas at Austin, US, said that the amount of health benefits and how they are distributed across the countries would depend on how climate mitigation is shared globally. The analysis, published in The Lancet Global Health journal, shows that under a least-cost approach -- where emissions are cut wherever cheapest to do so -- LMICs shoulder a significant share of the mitigation effort but also reap the largest air quality benefits. However, wealthier nations bearing more of the climate mitigation effort under an 'equity-based approach' could result in LMICs paying less, but may avert nearly four million fewer premature deaths, because less fossil fuel reduction occurs where air pollution is the worst, the researchers ...