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18:37 1st and 2nd lines of defence 1st and 2nd lines of defence	1st and 2nd lines of defence pathogen immune inflammation disease science From heilbrunn 0 likes 1 plays
10:34 Trophic Levels Trophic Levels	Trophic Levels trophic levels environmental science apes ap environmental science advanced placement environmental science net primary productivity gross primary productivity science From heilbrunn 0 likes 8 plays
29:17 Urbanization & Sustainable Cities Urbanization & Sustainable Cities	Urbanization & Sustainable Cities science From heilbrunn 0 likes 0 plays
13:16 Acid Deposition Acid Deposition	Acid Deposition acid rain environmental science acid precipitation science From heilbrunn 0 likes 1 plays
11:16 Climate Diagrams Climate Diagrams	Climate Diagrams climate diagrams climate graphs climatograms biomes environmental science science From heilbrunn 0 likes 2 plays
29:17 Urbanization and Sustainable Cities Vodcast Urbanization and Sustainable Cities Vodcast	Urbanization and Sustainable Cities Vodcast ap environmental science apes urbanization sustainability urban sprawl smart growth science From heilbrunn 0 likes 4 plays
27:18 Preserving Forests and Grasslands Preserving Forests and Grasslands	Preserving Forests and Grasslands environmental science forestry "forest management" "rangeland management" grasslands science From heilbrunn 0 likes 50 plays
11:17 How Energy Flows How Energy Flows	How Energy Flows first law of thermodynamics second law of thermodynamics apes ap environmental science environmental science energy efficiency science From heilbrunn 0 likes 2 plays
21:47 Using Economics to Improve the Environment Using Economics to Improve the Environment	Using Economics to Improve the Environment economics environmental science cap and trade gpi science From heilbrunn 0 likes 1 plays
13:09 Restoration Ecology Restoration Ecology	Restoration Ecology environmental science remediation "bronx river" ecology science From heilbrunn 0 likes 1 plays
15:48 Cycling Matter in Ecosystems Cycling Matter in Ecosystems	Cycling Matter in Ecosystems nutrient cycles biogeochemical cycles water cycle phosphorous cycle nitrogen cycle sulfur cycle apes advanced placement environmental science ap environmental science advanced placement environmental science science From heilbrunn 1 likes 27 plays
23:11 Nuclear Power Nuclear Power	Nuclear Power science From heilbrunn 0 likes 2 plays
16:26 How Scientists learn about the Universe How Scientists learn about the Universe	How Scientists learn about the Universe From heilbrunn 0 likes 0 plays
13:19 Energy Efficiency Energy Efficiency	Energy Efficiency energy efficiency environmental science science From heilbrunn 0 likes 0 plays
25:15 Toxicology Toxicology	Toxicology human health ld50 "silent spring" bioaccumulation biomagnification toxins science From heilbrunn 0 likes 0 plays
11:19 Solid Waste Solid Waste	Solid Waste environmental science solid waste sanitary landfill landfill incineration waste to energy science From heilbrunn 0 likes 1 plays