Er-hai Lake lies in state of Dali of Yunnan Province in China, which is so important to the local people that they revere her as the Mother Lake. Unfortunately, she is threatened by the more serious pollution of water. And from the water quality assessment of Er-hai Lake over the years, it is indicated that the major water pollution source come from nonpoint source pollution. The argument is th...

Synthetic nitrogen (N) fertilizer has enabled modern agriculture to greatly improve human nutrition during the twentieth century, but it has also created unintended human health and environmental pollution challenges for the twentyfirst century. Averaged globally, about half of the fertilizer-N applied to farms is removed with the crops, while the other half remains in the soil or is lost from ...

Chemical pollutants include such things as petrochemicals, dissolved metals, fertilizers and organic pesticides. Chemical pollutants are most concentrated adjacent to heavily populated areas, industry, intensive agriculture and military activities. Consequently, the adverse impacts of marine pollution are most apparent in the nearshore environment (state and territorial waters) (Green 1997). Th...

Environmental problems in agriculture have proven difficult to address due to the spatial heterogeneity and temporal variability intrinsic to agriculture. Agriculture is largely a struggle against nature; both its sustainability and the prospects for improving environmental performance and farm income simultaneously are thus inherently limited. Agriculture’s high degree of variability makes dir...

We investigate heavy haze episodes (with dense concentrations of atmospheric aerosols) occurring around Beijing in June, when serious air pollution was detected by both satellite and ground measurements. Aerosol retrieval is achieved by radiative transfer simulation in an Earth atmosphere model. We solve the radiative transfer problem in the case of haze episodes by successive order of scatteri...

This article examines economic incentives and other mechanisms to offset non-point source pollution from agriculture. A biophysical simulator to estimate technical relationships is linked to linear programming models for representative farms in the Willamette Valley of Oregon. The models are then optimized for profit maximization under alternative non-point pollution control policies. The resul...

Agriculture is one of several industries that face criticism today because of its impact on the environment. Pollution prevention technologies can go a long way toward addressing these concerns. They could also be beneficial to producers as they represent a move toward efficiency. The most common environmental pollutants from crop production are sediment, nutrients, and pesticides. This paper i...