(...) Among the most important environmental effects are soil erosion, destruction of forest and grassland vegetation, decrease of land quality and soil fertility, pollution by urban-industrial wastes and agricultural chemicals, and the depletion of water resources. Population growth, low income and the expense of modern technology have made these environmental problems worse. A new strategy of rural development, ecological agriculture, has been suggested as an alternative to the conventional way of developing agriculture. (…)
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Han Chunru (1989) studied this question.