Ebullating bed hydrocracking technology could be used to upgrade heavy residue for improving the light products yield of a refinery.

The residue includes heavy metals, carcinogens and even radioactive materials that young children can get on their hands and ingest, especially if they're crawling or playing on the floor.

It found gaping holes in the safety of American beef production, including residue of drugs, poisons and heavy metals in the meat we eat.