start learning
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start learning
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la contaminación del aire
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start learning
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start learning
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start learning
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start learning
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start learning
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productos químicos de fábricas
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start learning
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start learning
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el smog / la niebla tóxica
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start learning
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the sudden increase temperature start learning
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el aumento repentino de la temperatura
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start learning
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disminución de la temperatura
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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la contaminación del agua
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start learning
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pollutants discharged into water start learning
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contaminantes descargados al agua
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without adequate treatment start learning
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sin un tratamiento adecuado
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start learning
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eliminar compuestos nocivos
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start learning
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contaminación de la tierra
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start learning
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destruction of the Earth's surface start learning
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destrucción de la superficie de la Tierra
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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tratamiento de aguas residuales
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start learning
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la contaminación acústica
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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desechos vegetales y animales
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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Respetuoso del medio ambiente
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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el smog / la niebla tóxica
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start learning
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start learning
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la congestión del tráfico
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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reutilizar bolsas de compras
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make an effort to recycle start learning
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hacer un esfuerzo para reciclar
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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start learning
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efecto de la contaminación
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causes of air / land pollution start learning
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causas de la contaminación del aire / tierra
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