As SLR infiltrates the low-lying areas of the Planet, will it gradually wash out buried poisons to sea?

Question

Unlike temporary floods, that only wash buried pollutants to sea/river systems episodicaly and locally, Sea Level Rise will simultaneously flood ALL lowlands.

Developed Nations have vast areas of contaminated land and have been burying toxics in their own lowlans and those of their colonies'/client states. Chemical and radioactive wastes, landfills, cemeteries, waste dumps, animal and plague pits (organism's notional life: 1000 yrs) etc.

What will happen as sea water SIMULTANEOUSLY infiltrates, dissolves, washes out at each tide, GLOBALLY, and recirculates them all over ALL of the world's coasts, before washing them out to sea?

What are the chances of preventing a mass extinction of most marine AND many terrestrial species of the wet margin, by gradual bioaccumulation in the trophic webs?

CAN Developed Nations [intent on hedonistic lifestyles, mindless trivia, hyper-expansion and Neolithic religious wars] prevent Bio-Armageddon?

WILL THEY?

Can WE?

Answer 1

Hey, don't worry about this stuff, any effect will be far too slow to worry about.
Plague is no problem to the modern world (it is present in western USA squirrels, for example). Cemetries are simply dust to dust, as intended.
Most dumps are very small and will degrade slowly with time.
I am as concerned as anyone about the environment but I am much more concerned about very local toxins. For example, you put 4 tyres on a car then worry like mad about where they are dumped when they are worn out BUT... what has happened to all the rubber worn away on the road!