and these substances can leach into the surrounding soil and water as the metal or timber casings disintegrate.
(these substances; can leach; into the surrounding soil and water; T:as the metal or timber casings disintegrate) (the metal or timber casings; disintegrate; )
these substances the metal or timber casings
can leach disintegrate
into the surrounding soil and water T:as the metal or timber casings disintegrate