text: Yo, check it out, I got a story to tell
  'Bout the Tiber River and the urban dwell
  In Rome, sediments collected, gotta test 'em right
  For mutagenicity, see if they ignite
  
  Vicia faba root tips, the MN test
  Scoring micronucleus events, we're the best
  Chromosome and chromatid loss, fragments too
  Gotta see what these sediments can do
  
  Polycyclic aromatic hydrocarbons, PAHs they call 'em
  Chemicals in the mix, gotta appall 'em
  Thirteen important ones, we check 'em out
  Heavy metal ions, Cd, Cr, Cu, no doubt
  
  Prima Porta, Acqua Traversa, Aniene, Magliana
  These tributary rivers, they play the panorama
  Right before they join the Tiber's flow
  We collect the samples, let the data show
  
  Upstream, downstream, we cover all the ground
  July '92, that's when we were around
  Mutagenicity levels, they make you pause
  Like an X-ray exposure, up to 0.4 Gy, no flaws
  
  Chemical analysis, we break it down
  PAHs from 4.5 to 625.2, it's renowned
  In ng/g of dry matrix, that's the range we see
  Heavy metals from 130 to 570 ppm, believe me
  
  Tiber River's mutagenicity, it's a sight to see
  Local factors at play, not an upstream decree
  Polluted tributaries, they join the flow
  Causing this alarming effect, now you know!