• 4 Environmentalists
• 2 Generation Z
• 2 Political activity
• 2 Youth
• 1 Biodegradable products
• 1 Climate change mitigation
• 1 Climatic changes
• 1 Explorers
• 1 Green technology
• 1 Plastic marine debris
• 1 Pollution
• 1 Recycling (Waste, etc.)
• 1 Rothschild, David de
• 1 Sustainable agriculture
• 1 Sustainable buildings
• 1 Urban agriculture
• 1 Waste disposal in rivers, lakes, etc
• 1 Water
• 1 Wildlife conservation

• 11 Cable News Network
• 1 Peltier, Autumn, 2004-

• 11 English

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