3 ms·
>Widely used hard materials, e.g., alloys and ceramics, are often nonrenewable and expensive Alloys and ceramics are non-renewable? Aren't they pure mineral?
by hammock 5y ago
>Widely used hard materials, e.g., alloys and ceramics, are often nonrenewable and expensive
Alloys and ceramics are non-renewable? Aren't they pure mineral?