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Renewable means it comes back after it is 'used', like water or sunlight, or it can be grown again, like pine trees.

Saltpeter (potassium nitrate) is non-renewable.

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12y ago
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12y ago

Salt is classed as renewable, because there is always more in the sea, and the sea is always being topped up with minerals washed down by the rivers.

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Q: Is saltpeter renewable or non-renewable
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