Mineral resources Land resources 5 Water resources 5 Disaster management 4 Ecosystems 4 Energy resources 4 Food resources 4 Forest resources 4 Renewable resources 4 Geology 3 Natural resources 3 Nuclear pollution 3 Radiation pollution 3 Wasteland reclamation 3 Climatic change 2 Earth sciences 2 Earthquakes 2 Environmental studies 2 Human population 2 Marine pollution 2 Mines 2 Natural disasters 2 Noise pollution 2 Non renewable resources 2 Soil pollution 2 consumerism 2 AIDS 1 Air pollution 1 Arid Lands 1 Biological resources 1