
People walk in a beach with sargasso in Playa del Carmen, Quintana Roo state, Mexico, on Aug. 10, 2015. According to local press, the phenomenon of the sargasso has affected 180km of beach in the Caribbean. (Xinhua/Pedro Rodríguez/NOTIMEX)

People walk in a beach with sargasso in Playa del Carmen, Quintana Roo state, Mexico, on Aug. 10, 2015. According to local press, the phenomenon of the sargasso has affected 180km of beach in the Caribbean. (Xinhua/Pedro Rodríguez/NOTIMEX)