Biome Glitch Discovery Volcanic #3

I got a glimpse of air-quality data when I fixed that glitch. No surprise, mate -- breathing here is bad for your health. But it isn’t just all the smoke and ash in the air. The earthquakes open up vents to underground pockets of poison gas. That gas escapes to the surface, and well, you can guess the rest. The poison gas dissipates eventually… but can you hold your breath until “eventually”?