Synthetic is man made.
Alcohol is a natural substance that is produced by a chemical reaction in fruits, vegetables, and spices called fermentation
The oceans are NATURAL made.(made my nature). A building, some lakes, are MAN made.(made by man).
natural
Glass is comprised of silica, which makes up approximately 15% of our planet. Glass occurs naturally wherever silica is heated to very high temperatures, such as a creator. Glass can be produced...