Streams and creeks contaminated by strip mine discharges will remain contaminated and without aquatic life.
Although there are many uncertainties in how long seafood may remain contaminated in the Gulf, the quantity of oil suggests that contamination could persist for many years.
Had it met its target all those years ago it would have probably blown a vast hole in Cambodian soil where at least 2000sq km of land remain contaminated and possibly several thousand tonnes of munitions are still under water.
Long after the ban on leaded gasoline, soil near streets and roads can remain contaminated.
The water can remain contaminated for decades after a mine shuts.
In Japan, some densely populated areas are expected to remain contaminated with relatively low levels of radioactive materials for decades.
Housekeepers could be encouraged to spend more time on the items found to remain contaminated after cleaning, for example.
These mattresses remain contaminated with bacteria, even after terminal cleaning with quaternary ammonia compound.
This study shows that a mail sorter may remain contaminated, as indicated by surface sampling, many days after processing B. anthracis contaminated letters and despite topical bleach cleaning.
Six children have died since the January ceasefires and many areas remain contaminated with hazardous materials including UXO.
