H2S

H2S is a poisonous gas that appeared in Punk Hazard.

Effects
It is the formula for hydrogen sulfide, a poisonous gas that can be very harmful for every tissue in the body if it is contacted in any way. It can also be found in a liquid or gel-like form.

History
Four years ago, Caesar Clown let H2S gas leak out on Punk Hazard. This devasted the island's ecosystem, killing many forms of life on it, but he remembers the fact that some of them survived. Caesar then collected the gas and compressed it, thus creating his pet and weapon of mass destruction called Smiley.

It is one of the chemical compounds that Caesar uses as a poisonous gas.