Sooooooo, you'd rather have a clogged up sewer, than a dead plant eh? Is
that what you're getting at?
re: (salt) kills the roots but leaves the trees unharmed
Curious...how does this work? How does the salt know where to top
doing it's damage?
According to the document at this site:
Salt-weakened plants are more susceptible to insects, pathogens, and
the environmental stresses of drought, wind and ice. Damage can occur
to plants located up to 50 feet away from a heavily salted area. You
may not even see the damage until the following June or later when
brown leaf margins suddenly appear as a tree endures its first stress
of the season. Salt damages plants in two ways - via an airborne spray
that kills dormant buds by penetrating leaf scars, and in the soil
where it breaks down into its two components - sodium and chlorine -
which act differently to kill the plant.