The document discusses phosphorus contamination in Lake Champlain and its environmental, economic, and social impacts. Lake Champlain is an important water body that supports wildlife habitat and recreation. Excess phosphorus from sources like agricultural and urban runoff is causing problems like algal blooms and decreased water quality. Solutions proposed include adopting watershed and ecosystem approaches, preventing pollution, education, and reducing phosphorus from urban and agricultural non-point sources like lawn and farm runoff.