Plastic materials (with some exceptions) are chemical substances.
Chemistry
Organic chemistry.
plastic surgeon
my relatrionship in chemistry about my life to protect our world
They helps because they is good in the people, for the chemistry. When the same but no chemistry, is not plastic biodegradable but, otherwise good for them which why they helps. Not the biology!
I do not believe there is a relationship between chemistry (the science) and accounting
Chemistry is really important.
plastic surgeon
Steroids are chemicals, so their relationship to chemistry is quite direct.
chemistry
nothing
because of the physical and family relationship which is also classified as chemistry