Trains
How do you get rid of Waste?
The rulebook's Reduce & Reuse section states the pass-and-return action and the all-or-nothing rule.
- Trains rulebook · Rulebook · Reduce & Reuse – How to Get Rid of Waste
If you pass your turn completely, neither playing nor buying, you may return all the Waste in your hand to the Waste stack as a special action. You cannot return only some of it.