Man made
Man made
It is natural but there are man-made imitations.
It can be made from natural or man made fibres.
Rubber is man-made but has natural agents.
Is limestone natural or man made
There are only 4 natural fabrics: cotton, wool, linen and silk. Everything else is man made,
Man made
what gases? I'll guess that you mean oxygen. Natural source - the air, man-made - none.
It works by itself and is not man made.
Sun is a natural source of light because it gives out sunlight all by itself and it is not man- made.
Nothing man made is natural. The sun is a natural souce of light.
No, it's an exceedingly unnatural material. For complicated reasons, if you polymerize ethylene, you get polyethylene, but if you polymerize propylene, you get ... polyethylene again. You have to use trickery (usually in the form of a Ziegler-Natta catalyst) to get polypropylene.
Any heat source, whether man-made or natural.
because it can became with lihtning and with human.
There are no raw materials in it. It is a man made chemical product.
It is natural but there are man-made imitations.
It can be made from natural or man made fibres.