Sedimentary rock is comprised of sediment, as the name suggests. Over time, tiny minerals, sand, rocks, and debris layer on ...

Chemical pneumonia is an unusual type of lung irritation. Pneumonia usually is caused by a bacteria or virus. In chemical pneumonia, inflammation of lung tissue is from poisons or toxins. Only a ...

Since 1998, the Chemical Safety Board has played a key role in probing the causes of major chemical accidents. Accessibility statement Skip to main content. Democracy Dies in Darkness.

At least five people have died and six more people are missing after a large explosion rocked a chemical plant in eastern China on Tuesday, according to local authorities.