Hydrogen Sulfide

H2S is a gas that forms naturally in crude oil, natural gas, and water with high sulfur concentrations (sour water).

• H2S is soluble in water, and may be released out of the water if there is change in the pH, line pressure, and /or temperature.
• Some of the process areas may generate potentially fatal concentrations of H2S. These sources could be from raw materials, process reactions, or exposure of materials during a fire.

More detail about the properties and effect cause by Hydrogen Sulfide can see on Hydrogen Sulfide properties.

Arsenic Trioxide

On the bellow story is about the reaction effect that caused by bad our environment. Many industrial waste contain chemical that can’t be proceed by our body, or animal body like shrimp or crab from sea or river. If the chemicals consume by our body or animals body then accumulate on the body and can cause cancer. If scrimp accumulate risk chemicals on their body and then consume by us then we can poisonous or accumulate again in our body.

More detail can see here on Arsenic Trioxide.