Title: Where does the phosphorus come from? | Science Buzz
Headings: Where does the phosphorus come from?
Where does the phosphorus come from?
Phosphorus doesn't stay put
Phosphorus comes from many places
Changes in land use create changes in phosphorus

Content: Every lawn, every farm, every golf course that uses phosphorus contributes a little bit. But add all those little bits together, and they account for 80% of the problem. Learn more about how excess nutrients in the water cause problems in the Gulf of Mexico's "Dead Zone". Changes in land use create changes in phosphorus
Since 1940, the amount of phosphorus in the St. Croix has risen dramatically. This coincides with two major changes in the way we use the land: Farms started using phosphorus-enriched fertilizer to increase crop yields. Cities and towns have grown dramatically, creating more phosphorus-laden sewage. Newly paved streets and parking lots also produced more runoff, carrying phosphorus into the river. The population of the St. Croix basin is expected to increase by 25% in the next 20 years. This will only add to the phosphorus in the river, unless we start making some changes.