Question

when hazardous waste is stored underground in barrels, the barrels must be made of which material to ensure that the barrels dont rust, break, or leak?
plastic
wood
glass
paper

Explanation:

To store hazardous waste underground, the barrel material must resist rust, breakage, and leakage. Plastic is non - rusting, durable against underground conditions, and less likely to break or leak compared to wood (prone to rot/break), glass (prone to break), and paper (prone to disintegrate/leak).

Answer:

A. plastic