Owner of Jones Mineral Cabinet, Geology and Paleontology Supervisor, interested in Earth and Planetary sciences. #1. Clastic or Detrital Sedimentary Rocks The class(t)ic route begins with the weathering and erosion of sedimentary, igneous, or metamorphic rocks.
A flame retardant is a chemical substance that is added to materials during their manufacturing process in order to both reduce the likelihood of the finished product catching fire and slow down combustion. Source: GreenFacts.
Brominated flame retardants (BFRs) and polyvinyl chloride (PVC) are both in a category of chemicals called halogenated compounds. Because this group of chemicals shares many traits and hazards, this section of our website looks at the whole category of chemicals.