SUBJECT
Conservation of natural resources
Environmental policy
85
Environmental protection
85
Natural resources
72
Human ecology
53
Management
51
Ecology
50
Environmental aspects
43
Sustainable development
43
Citizen participation
37
Pollution
36
Nature conservation
23
Economic aspects
22
Economic development
18
Environmental education
17
Study and teaching
15
Forest conservation
14
Government policy
12
Congresses
10
Land use
10
Nature
10
Planning
10
Biodiversity conservation
9
Effect of human beings on
9
Law and legislation
9
Research
9
Environmental conditions
8
Environmental degradation
8
Geology
8
History
8
Logging
8
Marine resources conservation
8
Sustainable agriculture
8
Environmental management
7
Ecosystem management
6
Forest policy
6
Indigenous peoples
6
Juvenile literature
6
National parks and reserves
6
Natural areas
6
Power resources
6
Watershed management
6
Biodiversity
5
Climatic changes
5
Community-based conservation
5
Environmental law
5
Environmentalism
5
Influence on nature
5
Philippines. Department of Environment and Natural Resources
5
Protection
5
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