A Blob Called Fatberg

I know what an iceberg is - but I just learned that a "fatberg" is a rock solid agglomeration of fat, disposable wipes, diapers and other unmentionables clogging the nineteenth century sewers of London. The current "berg" would tip the scales at 140 tons. The utility is attempting to convert some of the waste fat into environmentally friendly fuel. And the Museum of London is seeking a cross-section of the blob for its curiosity collection. Some tourists visit Paris to tour the
 sewers but not so to London. Maintain a stiff upper lip as you hold your nose.
tjs
https://www.nytimes.com/2017/09/13/world/europe/uk-london-fatberg.html?rref=collection%2Fsectioncollection%2Feurope&action=click&contentCollection=europe&region=stream&module=stream_unit&version=latest&contentPlacement=10&pgtype=sectionfront&_r=0