非洲环境问题部长级会议
African Ministerial Conference on Environment
社会环境问题
social and environmental problems
城市环境问题
urban environmental problem
地下水环境问题
groundwater environmental problems
地下水及其环境问题
groundwater and environment problems
地质环境问题
geological environment problem
Environmental and Geological Problems
geological environmental problem
geologic environment issue
geological environment problems
工程和环境问题
engineering and environmental problems
环境问题
envi ronment problems
environment problems
environment questions
Environmental problems
environmental issues
environmental aspects
enviroment problem
environmental concerns
environmental problem
environment issues
Environmental
environments problems
The problem of environment
environmental aspect
environmental issue
environment issue
environmental pollution
Problems in environment
environment problem
Hazard
environmental protection problem
environmental control
environmental question
Environment
环境问题科学委员会
Scientific Committee on Problems of the Environment
Benchmark stability
环境问题评价
evaluation of environment problems
结构性环境问题
structural environmental problem
矿区环境问题
environmental problems in mine areas
矿山地质环境问题
mining geology environmental problems
mining environmental geological problem
矿山环境问题
Mining environment
environmental problems in mines
mine environment
农村环境问题
Rural environment problem
environmental problems in rural area
农业环境问题
problems of agricultural environment
区域环境问题
regional environmental problems