Another good business opportunity: some truck drivers use stimulants. Some of those stimulants will end up in the urine, where they can be extracted and re-sold.
During WWII, there was a limited supply of penicillin (discovered in 1928 but not used on humans until 1941/1942). Since ~99% is excreted in the urine, it was collected, cleaned up, and re-used.
During WWII, there was a limited supply of penicillin (discovered in 1928 but not used on humans until 1941/1942). Since ~99% is excreted in the urine, it was collected, cleaned up, and re-used.