"So, is it OK for me to just dump my oil? No, because even though my dumping would cause no measurable harm, if everyone dumped it would cause great harm to pu

"So, is it OK for me to just dump my oil? No, because even though my dumping would cause no measurable harm, if everyone dumped it would cause great harm to public resources, such as Puget Sound." Dumping oil cause SO MUCH measurable harm. It is so interesting how oil spread too thin on water(near molecular size, in fact this is a method to measure its size) and enormously change the air-water interface of big quantities of water and so its properties(chemical concentration(oxigen diffusion) and heat transfer, surface tension), killing a lot of biomass,affecting trees(you can kill trees just with oil(I have seen that with just one can of car oil)as it affects its roots, fish, insects and water wells. Its harm is VERY measurable. Biological Oil degrade easily, industrial oil not so.