Humans are overloading the world’s freshwater bodies with phosphorus
Poorly treated sewage and fertilizer runoff are main sources of the nutrient
![algal bloom](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/02/020518_CG_phosphorus_pollution_main.jpg?fit=860%2C460&ssl=1)
FEELING GREEN Freshwater bodies on more than a third of Earth’s land area (excluding Antarctica) are maxed out on phosphorus, which can help create algal blooms such as this one.
Felix Andrews (Floybix)/Wikimedia Commons (CC BY-SA 3.0)