Question

what happens to solid waste when it is thrown away? it is ground up to be made into new stuff. it ends up in disposal sites and landfills. it always disappears and is gone forever. it disappears without even a trace.

Explanation:

Solid waste that is thrown away typically ends up in disposal sites and landfills. Recycling (ground up to be made into new stuff) is a process for some waste but not all. Waste doesn't "always disappear and is gone forever" or "disappear without even a trace" as many waste materials persist in the environment for long periods.

Answer:

It ends up in disposal sites and landfills.