Since overloaded oil glands can easily clog up pores, be sure to use plenty of hot water when washing your face.
If the first method be adopted, the trouble which presents itself is that the tar contains a high percentage of pitch, which tends rapidly to choke and clog up all the pipes.
Also, raw bran can simply clog up the gut, making constipation more likely.
It can clog up your entire sewage system.
So not only do they not clog up landfills and animal habitats, they don't poison their surroundings as they decompose either.
