What is an antibioic made from green mold?

An antibiotic made from green mold is penicillin, which is derived from the Penicillium mold. Discovered by Alexander Fleming in 1928, penicillin was the first true antibiotic and has been widely used to treat bacterial infections. It works by inhibiting the growth of bacteria, ultimately leading to their destruction. Penicillin has saved countless lives and paved the way for the development of other antibiotics.