Both - Steam can come from natural things like the hot springs but it can also be man made like when you boil water, I guess it just depends on how you look at it.
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
Man made.
Hydro energy is man made from natural resources
Pollution is man made. From steam factories to rubbish is all created by man, therefore making pollution not a natural hazard nor disaster.
It is called steam if man made by heating water. If it is natural, it is fog.
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
Satellites can be natural, and satellites can be man-made. They cannot be both. Satellites are either natural or man-made.