Study maps where humans are driving harmful nutrient levels along coasts

Study maps where humans are driving harmful nutrient levels along coasts

VANCOUVER, Wash. — Along a quarter of the planet’s coastal waterways, humans contribute more harmful nitrogen – via agricultural runoff, wastewater discharges and other activities – than all natural sources combined. That is a key finding from a new study, led by Washington State University, that measured and mapped the human impact on nitrogen, phosphorus […]