On an isolated chlorine tile (maybe other gasses too but haven't tried) with solid (non-gas) tiles around it, if I put a basic/standard tile (used granite) over the chlorine tile, then "dismantle" the tile, the gas does not come back. Where does the gas go?
Update: also works with CO2.
1. Locate an isolated chlorine tile next to (surrounded by) solid (non-gas) tiles 2. Build a basic/standard tile over the chlorine tile 3. Dismantle the tile