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The energy is needed for new growth, but the nutrients are recycled from the "old growth" from the older & diseased plants and animals dying. That puts their nutrients back into the system. So all it really needs is a constant supply of energy. Our biosphere, the Earth, is just a giant ecosystem that recycles all its nutrients, which can be considered as raw materials, that are used to build new life. If we look at the way we handle our "nutrients" like product that we buy every day, we can get a good picture of how wasteful it is to throw things away. We throw away so much plastic that they end up in the ecosystem and harm or kill the animals in it. There is a report that says that every cow in India has an average to 10 plastic bags in its stomach when it dies.

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16y ago
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9y ago

Ecosystems need a continual influx of new energy to sustain new growth. Nutrients to support this new growth comes from dead and dying plants that are re-used.

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16y ago

because chickens fly

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Q: Why do ecosystems need a continual influx of new energy?
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