Production and use of nitrogen fertilizer is expensive and a significant source of air and water pollution and greenhouse gases in the atmosphere.
Most of the oil in the sea comes from human activities near the coast.
Not all pharmaceutical compounds can be removed by traditional methods of treating wastewater.
The benefits of reducing mercury pollution deposited from the atmosphere are quickly reflected throughout the ecosystem.
It will take a long time to flush this past memory of nitrogen use out of the ecosystem.
An iconic landmark of the region, and the largest swamp in North America, is now vulnerable
the color of rivers seen from space may provide a better index of the health of rivers than simple visual observations from land
Atrazine resembles the growth hormones of other organisms, including frogs and potentially humans.
Inasmuch as the runoff of nitrogen is an interstate transport problem, managing the application of fertilizer and loss of nitrogen to runoff should be a high priority for the Federal government.
The microparticles in soil and sediments may persist indefinitely, casting a sedimentary record of human activity on the planet.