Answer:

1. Harmful

. Acid

.Glues

.Heavy metals

.Disinfectant  

.Paint

.Pesticide

2. Hazardous

.flammable

.explosion

.acute toxicity

.corrosive

.hazardous to the environment

3.Useful

.fabrics

. bamboos

.metal

.glass

.ceramic

4.Reused

.glass jar

.clothes

.plastic bags

.gallons

.newspaper

Explanation: