Sustainability, nutrients, Carbon footprint, Millennium development goals, Eutrophication potential, Small-scale sewage systems
Chesapeake Bay, Flow normalization, Long-term seasonal trends, Nutrient and sediment loadings, Susquehanna River Basin
Heavy metals, Multivariate analysis, Chemical speciation, Grassland soil, Northeast China
temperature, temporal variation, Spatial variation, water velocity
Economics, LCC: QH75, Dewey: 333.9516