Nitrogen & Phosphorus Cycles: Always Recycle! Part 2 - Crash Course Ecology

The video explores the scarcity of nitrogen and phosphorus, essential nutrients for organisms, despite their abundance in nature. It explains the nitrogen cycle, highlighting the role of bacteria in making nitrogen available to plants, and the phosphorus cycle, focusing on its movement through rocks and water. Human interventions, such as synthetic fertilizers, have increased nutrient availability but also caused environmental issues. The video concludes with a preview of the next topic on human impacts on the biosphere.

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