Police detain a taxi driver who, along with other cabbies, blocked a main road to protest the one day per week driving restriction in Mexico City, Wednesday, April 13, 2016. Last week, under new regulations imposed after the capital experienced its worst air-quality crisis in over a decade, 40 percent of cars were ordered temporarily off the road. The anti-pollution measures run through the end of June, when the rainy season begins. (AP Photo/Eduardo Verdugo)

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