On February 22, the U.S. and Canadian governments announced a joint goal of reducing phosphorus runoff in Lake Erie by 40 percent within the next two years. Excess phosphorus has led to massive algal blooms that have killed fish and fouled water — such as in 2014, when algal blooms left more than 400,000 in Toledo, Ohio and southeastern Michigan unable to drink tap water for two days.
The phosphorus feeding the algal blooms primarily comes from fertilizers and livestock manure from regional farms. However, sewage from urban treatment plants and faulty septic tanks also contribute. The U.S.-Canadian deal targets runoff in the hardest-hit areas: Ohio, Michigan and Ontario.
To learn more, check out coverage at cbc.ca/news.
[Photo from NOAA]