Concrete, Mortar, Brick, Block, Re bar for support
Natural is to nature as artificial is to artifice.
The definitions is : Natural- A natural plant Artificial- An artificial one
artificial
artificial
natural
Natural silk is a proteinic fiber (sericin and fibroin).
artificial can't be found in natural environment and are maken in labs
artificial
Curium is an artificial element.
Artificial is not natural, is man made.
natural plasma- sunlight, artificial plasma- tube light