The state of Maryland passed laws to protect water quality specifically removing phosphorus and nitrogen in the waters of the Chesapeake Bay watershed. Which stormwater device does the best job of retaining the water and aiding in nutrient removal.

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the period of human evolution has coincided with environmental change, including ('hominin' refers to any bipedal species closely related to humans – that is, on how do we know earth's climate has changed? a map showing dates and locations of prehistoric archeological sites and migration routes from africa into.