The air was polluted by the gas from the factoties.The p____

The air was polluted by the gas from the factoties.The p____ Little___done to prevent the air from being polluted. The harmful gas from the factories pollutes th air.The harmf What polluted the air and the water in this area? Wastewater from factories polluted the river为什么用polluted every means_stop the air from being polluted in that small t The air was full of city gas,now my world except the smell o 从句变分词：the water was from the river which had been polluted b by the air or by air the polluted air is very dangerous _______the people's healt Cars pollute the air in the form of ------(waste) gas. 这个句子如何翻译?The gas that came from the briken container was rea