What is the opinion that the American Geological Survey has given to the question "Is it safe to burn marshmallows at the crater of a volcano?"

Volcanic crater is also known as a dangerous place, as volcanic gases harmful to the human body are released. Meanwhile, some Twitter usersUS Geological Survey (USGS)I asked "Is it safe to bake marshmallow on the crater crater of a volcano?" Such questions are often thrown from specialized agencies, but USGS is a topic that expresses views ruled out.

Roasting marshmallows over lava in Hawaii is a bad idea, USGS says
https://mashable.com/2018/05/29/marshmallow-roasting-hawaii-lava-kilauea/#iRITV_7K.Oqd

The beginning of Jay Furr's question was the tweet below. Jay Furr says "Is it safe to bake marshmallow on the crater crater at the volcano, assuming you had a stick of sufficient length? Is it okay if the baked marshmallow is toxic?" .

@USGSVolcanoesIs it safe to roast marshmallows over volcanic vents? Assuming you had a long enough stick, that is? Or would it marshmallows be poisonous?@ JimGriffith_SV@ DrFunkySpoon

- Jay Furr (@ jayfurr)May 29, 2018

In response to this question, the USGS must say "It is not safe" and do not do it absolutely! There are many sulfur dioxide (SO₂) Or hydrogen sulfide (H₂S) has been released, the taste will not be good. Also, if you add sulfuric acid (eg volcanic gas) to sugar you will see a spectacular reaction. " The fact that USGS showed a serious opinion surprised many users.

If you add not sulfuric acid (Please do not try!) If the addent is emitted a lot of SO2 or H2S, they would taste BAD. in vog, for example) to sugar, you get a pretty spectacular reaction.

- USGS Volcanoes (@ USGSVolcanoes)May 29, 2018

According to USGS's reply, gases such as hydrogen sulfide are released from the volcano crater. When exposed to hydrogen sulfide at a concentration of 500 ppm (0.05%), a person loses consciousness in about 5 minutes and may die within one hour. Therefore, it is highly likely that you will have a breath just by approaching the crater, actually it is expected to die out before making baked marshmallows.

USGS indicated in the reply "Sulfuric acid (sulfuric acid (H₂SO_Four), You can check the following spectacular movie.

Sulfuric Acid and Sugar - Dehydration of Sugar Experiment - YouTube