Fluorine forms the strongest bonds to carbon that are available (much stronger than a carbon-carbon or carbon-hydrogen bond, also stronger than carbon-chlorine)

Fluorine forms the strongest bonds to carbon that are available (much stronger than a carbon-carbon or carbon-hydrogen bond, also stronger than carbon-chlorine). It acts like an immovable stub preventing further reactions, which is great for materials like nonstick coatings, but also prevents natural breakdown in the environment.