👉 "Small coal" is a phrase used to describe a rare and potentially toxic form of coal, which has been known to contain high levels of mercury. This type of coal is typically found in areas where there are significant amounts of industrial activity or mining operations, such as in the United States and Australia. The presence of this toxic substance can be harmful to human health, particularly if ingested or exposed to it for long periods of time. In terms of its use in various industries, small coal has
