说到汽车，除了呼吸排放的二氧化碳，自行车不排放有毒气体。
Green. Speaking of cars, apart from the CO2 from your breathing, bikes don't release toxic gases.
由于许多工厂向空气中排放有毒气体，我们现在不能呼吸新鲜空气。
We can not have fresh air because many factories have sent poisonous smoke into the air.
由于生活区附近的工厂不断地排放有毒气体，有些居民患有多种呼吸道疾病。
Some people suffer from a variety of respiratory diseases in that the factories around the residential quarters constantly emit toxic gas.
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