Question

what do incineration facilities produce that is an environmental concern? recycled metal garbage air pollution recycled plastic

Explanation:

Incineration facilities burn waste. When waste is burned, harmful substances are released into the air. Recycled metal and recycled plastic are products of recycling processes, not direct outputs of incineration that are environmental concerns. Garbage is what is put into incineration facilities, not what is produced as an environmental - concern output. Air pollution (such as particulate matter, dioxins, etc.) is a well - known environmental concern produced by incineration.

Answer:

air pollution