Go ahead, get on my case about harping about the evils of smoking. You may like to smoke, but I don't want you around me when you do. And if do you come around me, take a shower first. Just don't expect a good night kiss.
With that out of the way, it seems the country with the largest amount of smokers has potentially come up with a use for the filters of used cigarettes. You drop them in water, extract the volatiles from the water and use those volatiles to coat the inside of oil pipes and prevent them from rusting.
Weird, huh? Use known carcinogens to prevent pipes which carry oil from springing leaks. Who knew?!