yolosanti45
yolosanti45
09-06-2016
Biology
contestada
que es la contaminacion del aire
Respuesta :
vadimbur
vadimbur
09-06-2016
la presencia o introducción en el aire de una sustancia que tiene efectos nocivos o tóxicos.
the presence in or introduction into the air of a substance which has harmful or poisonous effects.
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