That guilty feeling when you've just committed a chemical crime! Every chemist knows the environmental sin of dumping organic solvents like hexane, toluene, or dichloromethane down the sink. Those compounds are environmental nightmares - they contaminate water supplies, kill aquatic organisms, and some are even carcinogenic. The proper disposal involves collection in waste containers for professional treatment. But sometimes when no one's looking... that methanol rinse might accidentally find its way down the drain. The divine disappointment is palpable!