Explain the concept of . If one part is removed (like a predator or a water source), the whole system wobbles.
How the non-living (sunlight) fuels the living (plants), and how the living (animals) change the non-living (soil nutrients). III. The Power Source: Energy Flow
Every square inch of Earth, from a crack in the sidewalk to the Amazon rainforest, is a "Nature City." II. The Definition (The Three Pillars)