natural
natural
Hydrogen is one of the most abundant gasses it is natural
Hydrogen is the most abundant element in the universe and is found naturally in various forms on Earth, such as in water and organic compounds. However, most of the hydrogen used as fuel or in industry is produced through man-made processes such as electrolysis of water or steam methane reforming.
It is natural but there are man-made imitations.
It can be made from natural or man made fibres.
Is limestone natural or man made
natural feature
Man-made and Natural Resources
No "NATURAL" calamities are man made.
Is limestone natural or man made
Ceramic is man-made from a natural material.
Is limestone natural or man made