Natural Substances are those which are prepared from herbs and minerals, not from chemical or synthetic sources.
Natural
No, its Natural History
nature, natural substances
honey
The natural substances are carbo-hydrogens, that come from the process of compression and pressure (and possibly heat) of the decomposing vegtable materials.
All these substances are natural.
The are the natural substances.
natural substances
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Aluminium - it is an element... the rest of the substances in your list are compounds.
neutral substances are natural in nature whereas basic substances are basic .