Polar regions Leisure, Recreation and Tourism Economics, (New March 2000) 4 Tourism and Travel 4 Natural Resource Economics, (New March 2000) 3 Coasts 2 Continental shelf seabed 2 Coral reefs 2 Deep sea 2 Economic impact 2 Ecotourism 2 Environmental impact 2 Estuarine ecology 2 Management 2 Marine ecology 2 Marine environment 2 Mountain areas 2 Natural Resources (General) 2 Pelagic ecosystems 2 Rocky shores 2 Rural Development, (New March 2000) 2 Sandy shores 2 Sustainability 2 Tourism 2 Tourism development 2 Tourism impact 2 Accommodation 1 Agencies and Organizations 1 Arctic regions 1 Arid lands 1 Asia 1