smoke and sun exposure, can produce them,
too. The oxygen free radicals react with and
create instability in surrounding molecules.
This process, called oxidation, occurs as a chain
reaction: the oxygen free radical reacts with
molecule “A” causing molecule “A” to become
unstable; molecule “A” attempts to stabilize
itself by reacting with neighboring molecule “B”;
then molecule “B” is unstable and attempts to
B