The solids from wastewater plants are usually dumped into landfills because they are contaminated with heavy metals. Now there is a way to remove the metals so the waste can be used as fertilizer.
The Great Lakes contain reservoirs of legacy contaminants, mostly in their sediments, that are vulnerable to resuspension.
The 'used water' that flows from our showers, dishwashers and toilets isn't a waste to engineers – it contains valuable materials. The challenge is recovering them and turning them into products.
US agriculture is dominated by large farms that rely on chemical inputs. In contrast, regenerative farming makes land and water healthier by mimicking nature instead of trying to control it.
Fertilizer is a key source of nitrogen pollution which fouls air and water worldwide. Current regulations target farmers, but focusing on producers could spur them to develop greener products.
Did Rachel Carson catalyze the organic farming movement, as many advocates claim? Or would she reject their ban on synthetic fertilizer and see organic as an inefficient way to feed the world?
Recent research shows that US rivers are becoming saltier and more alkaline. Salt pollution threatens drinking water supplies and freshwater ecosystems, but there is no broad system for regulating it.
Kenya's government responded with subsidies to tend to the 2017 maize crisis to ensure that it remained affordable. However, the country needs long term solutions to this perennial challenge.
Healthy soil teems with bacteria, fungi, viruses and other microorganisms that help store carbon and fend off plant diseases. To restore soil, scientists are finding ways to foster its microbiome.
A combination of factors – pollution, disease and overfishing – is harming corals but scientists have found clues to effective treatment by studying corals' microbiome.
Growing enough food to feed 9 billion people by 2050 will require huge amounts of energy and water. Using nanoparticles to boost plant growth and yield could save resources and reduce water pollution.
The same conditions – ultimately tied to nutrient runoff – that created the damaging toxic blooms and dead zones in US waterways of recent years are forecast to return this year.
About 10% of human-generated greenhouse gas emissions come from farming. Researchers are working on ways to address this piece of the global warming puzzle.
A law signed into effect last week seeks to reduce fertilizer runoff that causes toxic algae blooms. But to really address the problem requires taking a hard look at how America farms.