A team of US researchers has found that watershed wetlands can help to improve the quality of streams polluted by acid rain.
Water samples were collected in the Adirondack Park, a six million acre region in northeastern New York which has been affected by atmospheric acid.
The study found that streams connected to wetlands had higher organic content, which led to lower levels of toxic aluminium and decreased presence of harmful acids.
The organic matter was also found to stimulate microbes that process sulfate and nitrate which decrease inorganic acid levels.
Read more at University of Texas at Arlington