Skip to content Skip to navigation

N-Calculator Press Advisory

19 February 2011

New free, hands-on tool supports sustainable living choices

 Nitrogen footprint calculator enables individuals to chart and reduce their contribution to growing problem of nitrogen pollution (2/19/2011)

CHARLOTTESVILLE, VA – People who want to eat healthy and live sustainably have a new way to measure their impact on the environment: a web-based tool that calculates an individual’s “nitrogen footprint.” The device was created by award-winning scientist James N. Galloway, his research colleague Allison Leach at the University of Virginia, and colleagues from The Netherlands and the University of Maryland. The calculator is a project of the International Nitrogen Initiative, a global network of scientists who share research and data on the nitrogen dilemma. The project was launched Feb. 19 at the AAAS Annual Meeting in Washington.

What’s the big deal about nitrogen? Though residents of the Chesapeake Bay and Gulf of Mexico are likely familiar with it, it’s unknown to most Americans outside the agricultural world. For the last 30 years, Galloway and other leading scientists have been noting fish kills in coastal areas, threats to human health as a result of air and water pollution, and changes to global biodiversity and climate. This tool is one of their attempts to win more understanding of nitrogen’s role in our lives.

“Nitrogen, as any farmer knows, is essential to plant life,” said James Galloway, the Associate Dean for the Sciences in the College and Graduate School of Arts and Sciences at the University of Virginia and the Sidman P. Poole Professor in the Department of Environmental Sciences. “But the widespread use of synthetic nitrogen fertilizer to boost crop production has resulted in excess nitrogen coming off farms – essentially adding unwanted, unneeded fertilizer to our natural systems with disastrous results. The combustion of fossil fuels adds even more nitrogen to our environment. It’s a largely untold story.”

Scientists are calling nitrogen pollution a major environmental problem that includes significant damage to air and water quality in places such as the Chesapeake Bay, where the federal government has dedicated hundreds of millions of dollars to reducing nitrogen runoff from farms and industry.  In the Midwest, nitrogen runoff from farms is largely responsible for toxic algal blooms that have suffocated coastal waters, leading to hypoxic zones along the coast and and resulting in loss of fish and shellfish.

To raise awareness, Galloway, a pioneering nitrogen scientist, organized a global team of experts to develop the footprint calculator as an educational tool – one he and his colleagues hope will both raise the profile of the nitrogen issue and galvanize people into action.By measuring what and how much you eat, as well as other factors like how you travel, the calculator shows your impact on the nitrogen cycle.

The website also makes recommendations for how to lessen your “nitrogen footprint.” They are similar to other sustainable living choices: reduce airplane travel, choose renewable energy, and eat less meat, particularly beef. Professors and lecturers are already using the tool in classrooms to teach students how one individual can alter --and help restore--a natural cycle like nitrogen.

“Solving the nitrogen dilemma is a major challenge of our time,” said lead researcher Allison Leach of the University of Virginia. “By calculating our individual impact, and taking small steps to reduce it, we can all play a part – and send a strong message to our nation’s leaders that we want this issue taken seriously.”

This new footprint calculator is the first in a series of research tools, known as N-Print, which Galloway and his team are developing to connect the production of nitrogen with the policies used to manage it. The team is currently creating a similar calculator for farmers and other nitrogen users, as well as a tool for policymakers that will provide regional nitrogen emission ceilings, which will show how much nitrogen can be released in these regions without major negative environmental impact.

“There are readily available solutions to reducing nitrogen pollution,” Galloway said. “By connecting consumers, producers and policymakers, we can solve it.”

Chemical fertilizer use and combustion engines are the main sources of nitrogen pollution. Scientists who are recording dramatic changes to ecosystems from the US to China say the disruption of the nitrogen cycle leads the list of global tipping points and have named it a top threat to global biodiversity. It contributes to human health problems, water pollution, ozone layer depletion, smog, climate change, and coastal dead zones. Nitrous oxide, created mostly from grain and meat production, is also a greenhouse gas 300 times more potent than carbon dioxide.

This project is supported by the Agouron Institute, the US Environmental Protection Agency, the University of Virginia, and the Energy Research Center of the Netherlands.

For more information, visit http://www.n-print.org/