@article {1584,
	title = {Using the Ecosystems Services Approach to value air quality.},
	year = {2014},
	institution = {DEFRA},
	author = {Jones, M.L.M. and Provins, A. and Harper-Simmonds, L. and Holland, M. and Mills, G. and Hayes, F. and Emmett, B.A. and Hall, J. and Sheppard, L.J. and Smith, R. and Sutton, M. and Hicks, K. and Ashmore, M. and Haines-Young, R.}
}
@article {1343,
	title = {Upwind impacts of ammonia from an intensive poultry unit},
	journal = {Environmental Pollution},
	year = {2013},
	author = {Jones, L. and Nizam, M.S. and Reynolds, B. and Oxley, E.R.B. and Bareham, S.}
}
@article {1671,
	title = {The UK National Ecosystem Assessment},
	year = {2011},
	institution = {UNEP-WCMC, LWEC},
	address = {Cambridge},
	url = {http://uknea.unep-wcmc.org/Resources/tabid/82/Default.aspx},
	author = {UK NEA}
}
@article {1342,
	title = {UK Status Report July 2011: Update to empirical critical loads of nitrogen},
	year = {2011},
	pages = {55pp},
	author = {Hall, R.J. and Emmett, B. and Garbutt, A. and Jones, L and Rowe, E. and Sheppard, L and Vanguelova, E. and Pitman, R. and Britton, A. and Hester, A. and Ashmore, M. and Power, S. and Caporn, S.}
}
@article {1112,
	title = {UK Habitat Type - Freshwater},
	year = {2010},
	url = {http://www.jncc.gov.uk/page-1430},
	author = {JNCC}
}
@article {1432,
	title = {Use of sap flow measurements to validate stomatal functions for mature beech (Fagus sylvatica) in view of ozone uptake calculations. },
	journal = {Environmental Pollution},
	volume = {158},
	year = {2010},
	pages = {2954-2963},
	author = {Braun, S. and Schindler, C. and Leuzinger, S.}
}
@article {1609,
	title = {The use of biomonitoring tools to detect ecosystem response following exposure to contaminants emitted from a regulated industrial source.},
	year = {2008},
	institution = {Environment Agency},
	address = {Bristol},
	issn = {SC030175/SR3},
	author = {Long, S. and Lister, L. and Hankard, P. and Rothery, P. and Ainsworth, G. and Rowland, P. and Walker, L. and Wright, J. and Turk, T. and Bealey, B. and Leith, I. and Cape, N. and Spurgeon, D.}
}
@article {1479,
	title = {Unusual patterns of methanogenesis in a peat soil from New York State.},
	journal = {Abstracts of general meting of the American Society for Microbiology.},
	volume = {103},
	year = {2003},
	pages = {179},
	author = {Yavitt, J.B.}
}
@article {101,
	title = {UK Greenhouse Gas Inventory},
	year = {2002},
	url = {http://www.airquality.co.uk/archive/index.php},
	author = {NetCen}
}
@article {685,
	title = {Upland plant communities - sensitivity to change},
	journal = {Catena},
	volume = {42(2-4)},
	year = {2001},
	pages = {333-343},
	author = {Milne, J.A. and Hartley, S.E.}
}
@article {686,
	title = {UK Acid Waters Monitoring Network: 10 Year Report},
	year = {2000},
	publisher = {ENSIS Publishing},
	address = {London},
	url = {http://awmn.defra.gov.uk/resources/publications/2000publications.php},
	author = {Monteith, D.T. and Evans, C.D.}
}
@article {819,
	title = {Undergrowth as a biomonitor for deposition of N and acidity in pine forest.},
	journal = {Forest Ecology and Management },
	volume = {114},
	year = {1999},
	pages = {83-95},
	author = {Van Dobben, H.J. and Ter Braak, C.J.F. and Dirske, G.M.}
}
@article {102,
	title = {UK Greenhouse Gas Inventory, 1990 - 1996},
	number = {Report AEAT-3436, Issue 1},
	year = {1998},
	institution = {AEA Technology},
	address = {Culham, Oxon, UK},
	author = {Salway, A.G.}
}
@article {77,
	title = {UK Greenhouse Gas Inventory, 1990-1996},
	number = {AEAT-3436 Issue 1},
	year = {1998},
	institution = {AEA Technology},
	address = {Culham, Oxon., UK},
	author = {Salway, A.G.}
}
@inbook {595,
	title = {UNECE Critical Levels Workshop Proceedings},
	year = {1998},
	pages = {79-104},
	chapter = {Critical levels for effects of NOx},
	address = {Bad Harzburg},
	author = {Guderian, R.}
}
@article {203,
	title = {Unintentional experiments with terrestrial ecosystems: ecological effects of sulphur and nitrogen pollutants},
	journal = {Journal of Ecology},
	volume = {86},
	year = {1998},
	pages = {1-12},
	author = {Lee, J.A.}
}
@article {45,
	title = {Urban Air Pollution and Cardiopulmonary Ill-Health - A 14.5 Year Time Series Study},
	journal = {Occup. Environ. Med.},
	volume = {55},
	year = {1998},
	pages = {697-704},
	author = {Prescott, G.J and Cohen, G.R and Elton, R.A. and Fowkes, F.G.R. and Agius, R.M.}
}
@article {789,
	title = {Ultrastructural changes and electrolyte leakage from ozone fumigated epiphytic lichens.},
	journal = {Annals of Botany},
	volume = {80},
	year = {1997},
	pages = {611-621},
	author = {Tarhanen, S. and Holopainen, T. and Oskanen, J.}
}
@article {232,
	title = {The use of biomarkers in environmental exposure assessment},
	year = {1996},
	pages = {114 pp},
	institution = {Institute for Environment and Health},
	address = {Leicester},
	author = {Gompertz, D. and Shuker, D. and Toniolo, P. and Shuker, L. and Bingham, S. and Calow, P. and Coggon, D. and King, N. and McMichael, A. and Walker, C.}
}
@article {651,
	title = {The use of lichens for estimating ammonia air pollution in Western France. },
	year = {1996},
	institution = {, Universiti de Nantes},
	author = {Lallemant, R. and Joslain, H. and Houssay, I. and Cyprien, A-L.}
}
@article {482,
	title = {Uptake and assimilation of atmospheric NO2-N by spruce needles (Picea abies): a field study},
	journal = {Water, Air and Soil Pollution },
	volume = {85},
	year = {1995},
	pages = {1497-1502},
	author = {Ammann, M. and von Ballmoos, P. and Stalder, M. and Suter, M. and Brunold, C.}
}
@article {1529,
	title = {The use of an unenclosed field fumigation system to determine the effects of elevated ozone on a grass clover mixture.},
	journal = {New Phytologist},
	volume = {129},
	year = {1995},
	pages = {23-32},
	author = {Wilbourn, S. and Davison, A.W. and Ollerenshaw, J.H.}
}
@article {92,
	title = {Urban Air Quality in the United Kingdom. First Report of the Quality of Urban Air Review Group},
	year = {1993},
	institution = {DoE},
	address = {London},
	author = {Quality of Urban Air Review Group}
}
@article {1650,
	title = {Use of a field release system to distinguish the effects of dose and concentration of sulphur dioxide on winter barley.},
	journal = {Agriculture, Ecosystems and Environment},
	volume = {38},
	year = {1992},
	pages = {3-10},
	author = {Colls, J.J. and Geissler, P.A. and Baker, C.K.}
}
@article {1861,
	title = {Uptake, accumualtion and translocation of arsenate in arsenate-tolerant and non-tolerant Holcus lanatus L.},
	journal = {New Phytologist},
	year = {1991},
	author = {Meharg, A. A and Macnair, M. R}
}
@article {248,
	title = {On the use of mosses (Hylocomium splendens and Pleurozium schreberi) for estimating atmospheric trace metal deposition},
	journal = {Water, Air and Soil Pollution},
	volume = {50},
	year = {1990},
	pages = {63-76},
	author = {Ross, H.B.}
}
@article {723,
	title = {Unifying nutrient-chlorophyll relationships in lakes. },
	journal = {Canadian Journal of Fisheries and Aquatic Sciences },
	volume = {46},
	year = {1989},
	pages = {1176-1182},
	author = {Prairie, Y.T. and Duarte, C.M. and Kalff, J.}
}
@article {744,
	title = {Understanding the Pollution Sensitivity of Lichens},
	journal = {Botanical Journal of the Linnean Society},
	volume = {96},
	year = {1988},
	pages = {31-43},
	author = {Richardson, D.H.S.}
}
@article {238,
	title = {Urban distribution of Rhytisma acerinum (Pers.) Fries (tar spot) on sycamore},
	journal = {New Phytologist},
	volume = {108},
	year = {1988},
	pages = {175-181},
	author = {Leith, I.D. and Fowler, D.}
}
@article {1858,
	title = {Uptake of arsenic and mercury from soil by Bermuda grass Cynodon dactylon},
	journal = {Environmental Pollution},
	year = {1984},
	pages = {133-142},
	author = {Weaver, R. W and Melton, J. R and Wang, D and Duble, R. L}
}
@article {1652,
	title = {The utilization of sulphate and sulphur dioxide for the sulphur nutrition of alfalfa.},
	journal = {Plant Physiology},
	volume = {18},
	year = {1943},
	pages = {345-371},
	author = {Thomas, M.D. and Hendricks, R.H. and Collier, T.R. and Hill, G.R.}
}
