Assertion: hydrogen sulfide | /r/CapableOf | build up fatal concentration
Facets:
value: rapidly
type: MANNER
Source sentences:
text: When the sewage is allowed to stand for long time, hydrogen sulfide can build up in high concentration - up to 6000 ppm, and then gets quickly released when the liquid is disturbed (like when a soda can gets shaked), rapidly building up fatal concentration.