A pond with a stream flowing in and a stream flowing out maintains a nearly constant volume of 1,000,000 gal. The flow rate is about 2 gal/min. An industrial plant located upstream from the pond has been allowing pollutants to flow into the pond for some time. Water samples show that about 10% of the pond water consists of pollutants. Biologists have determined that for the species depending on the pond water the pollution level has to be less than 1 %. What is the rate that the plant can discharge pollutants if this level is to be reached within 5 years?
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