(Transportation) Choking mobility

A man selling chiclets gum in the subway of Mexico City (DF), a train in Chapultepec park in Mexico City (DF), an old truck coming down a mountain trail in Angangueo (Michoacan), traffic in Oaxaca City (Oaxaca), a firecracker explosion in Xochimilco (DF) and the breath of two climbers on Mount Popocatepetl (Mexico).

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