Unpaved roads lead to homes that are built with wood scraps and have tarps as roofing in Tijuana's Nueva Esperanza neighborhood. (Ana Ramirez / San … social experiment by Livio Acerbo #greengroundit

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Unpaved roads lead to homes that are built with wood scraps and have tarps as roofing in Tijuana's Nueva Esperanza neighborhood. (Ana Ramirez / San … social experiment by Livio Acerbo #greengroundit