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Subjects
Water conservation, Water in agriculture, Agricultural ecology, Agricultural wastes as fuel, Biomass energy, Cities and towns, City planning, Hydrogen as fuel, Irrigation efficiency, Purification, Renewable energy sources, Rural Sewage disposal, Sewage, Sustainable agriculture, Urban policy, UrbanizationPlaces
ChinaID Numbers
- OLID: OL6833801A
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October 21, 2010 | Created by ImportBot | new author |