Make marshes, keep Earth cool.

Laboratory Equipment recommends getting bogged down to prevent global warming, with research that shows man-made marshes can fight climate change:

…[S]ays Bill Mitsch, director of the Everglades Wetland Research Park at Florida Gulf Coast Univ. and an emeritus professor at Ohio State Univ.: wetlands also excel at pulling carbon dioxide out of the air and holding it long-term in soil.

Writing in the July-August issue of the Journal of Environmental Quality, published by the American Society of Agronomy, Mitsch and co-author Blanca Bernal report that two 15-year-old constructed marshes in Ohio accumulated soil carbon at an average annual rate of 2,150 pounds per acre — or just over one ton of carbon per acre per year.

The rate was 70 percent faster than a natural, “control” wetland in the area and 26 percent faster than the two were adding soil carbon five years ago. And by year 15, each wetland had a soil carbon pool of more than 30,000 pounds per acre, an amount equaling or exceeding the carbon stored by forests and farmlands.