a material is useful if it can properly be used, a material is harmful if the material cam cause physical harm to it's user and a material is a waste if it can no longer be used properly or if it's broken and can no longer be fixed.
Useful materials is a products that could be safely to use for every people like water, meatal, paper, woods, glass, marbles, ceramic, and many more.
Harmful Materials
Harmful materials is a product that could not safe to use or usually very dangerous, but it contains a chemicals and mostly can be found on the household products. Consuming any harmful products can be lead to the dangerous to the health.
Wasteful Materials
Wasteful materials is a product that could be able to change which can caused of chemical reactions like overripening of the bananas, molding a bread and decomposition of the dead meat.
