@article {Sutton2011a, title = {{Too much of a good thing.}}, journal = {Nature}, volume = {472}, number = {7342}, year = {2011}, month = {apr}, pages = {159{\textendash}61}, keywords = {agriculture, Agriculture: economics, Animals, Biodiversity, Climate Change, Cost-Benefit Analysis, Diet, Environmental Pollution, Environmental Pollution: adverse effects, Environmental Pollution: analysis, Environmental Pollution: economics, Environmental Pollution: statistics {\&} numerical da, Fertilizers, Fertilizers: analysis, Food Supply, Fossil Fuels, Humans, International Cooperation, Meat, Meat: utilization, nitrogen, Nitrogen Fixation, Nitrogen: adverse effects, Nitrogen: analysis, Nitrogen: economics, Nitrogen: metabolism, Reactive Nitrogen Species, Reactive Nitrogen Species: adverse effects, Reactive Nitrogen Species: analysis, Reactive Nitrogen Species: chemistry, Reactive Nitrogen Species: metabolism}, issn = {1476-4687}, doi = {10.1038/472159a}, url = {http://www.ncbi.nlm.nih.gov/pubmed/21478874}, author = {Sutton, Mark A. and Oenema, Oene and Erisman, Jan Willem and Leip, Adrian and van Grinsven, Hans and Winiwarter, Wilfried} }