A pyramid of biomass tells you the mass of the different organisms in a food chain (and it can give you a better picture of a food chain than a pyramid of numbers).
Energy is transferred in a food chain from one organism to the next.
Energy is lost in food chains.
The shorter the food chain is the more efficient food production will be.
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Improving, recycling and the Carbon cycle.
We can artificially improve the efficiency of a food chain when we are producing food, but this can be controversial.
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