@article {1338, title = {How extensive are the impacts of nitrogen pollution in Great Britain{\textquoteright}s forests?}, year = {2003}, pages = {66-75}, institution = {Forest Research}, address = {Edinburgh}, url = {http://www.forestry.gov.uk/pdf/FRreport0102.pdf/$file/FRreport0102.pdf}, author = {Kennedy, F.} }