The energy that the hawk has taken isn't enough for another animal to get any benefit therefore the pyramid has a limitation.
Answer:
At heart, all life on Earth uses a membrane that separates the organism from its environment. ... In this regard, water is essential simply because it's a liquid at Earth-like temperatures. Because it flows, water provides an efficient way to transfer substances from a cell to the cell's environment.
No because we keep putting it into the earth also decomposing animals give off carbon.
