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(D) The town of $Arcata$,located in California,created an integrated waste treatment process within a natural system. This project was developed by bi

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Arcata

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(D) The town of $Arcata$,located in California,created an integrated waste treatment process within a natural system. This project was developed by biologists from Humboldt State University. In this process,the wastewater is treated in two stages: $1$. The conventional sedimentation,filtering,and chlorine treatments are performed. $2$. To neutralize pollutants like heavy metals,the biologists developed a series of $60$ hectares of marshland. These marshes absorb pollutants and assimilate them,thereby purifying the water naturally.

Wastewater,including sewage,can be treated in an integrated manner by the marshland of which city in California?

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