Decades of farmers using more fertilizer than they needed have quietly built up large reserves of nutrients in the soil.
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A tale of two poos - attitudes towards the agricultural use of human excretion-based fertiliser differ between Japan and England as new research shows.
The most comprehensive assessment yet of a powerful greenhouse gas shows which countries are driving the increase, and which ones are successfully cutting emissions.
Biological and chemical substances are the most common food contaminants and account for over 200 food-borne illnesses.
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Professor, University of Maryland Center for Environmental Science
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Senior Scientist, Norwegian Institute for Air Research
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Chief Research Scientist, CSIRO Environment; Executive Director, Global Carbon Project, CSIRO
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Director and Institute Professor, Center for Earth System Science and Global Sustainability, Boston College
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Postdoctoral Research Scientist, African Population and Health Research Center
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Honorary Professor, International Relations, Brunel University of London
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Associate Professor of Geography, Penn State
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Professor and Tier I Canada Research Chair of Global Water Sustainability and Ecohydrology, University of Waterloo