DEGUANO:- That's the "depigeonication" of MAINLY pigeon crap which fills pavements squares and streets with "aerocrap" - pigeon - he "UNTRAINABLE".
What we need here, in Trafalgar Square, is to DEGUANO the joint. Wait for the small hours then powerhouse the droppings with high powered hot water.
by FABARM January 15, 2019