it is sometimes better to leave an oil slick alone because its too expensive to clean up

radioactive materials primarily get into the oceans

despite the 1975 and 1983 bans on dumping radioactive material at sea, they remain a concern because

so far the radioactive material

the main environmental concern regarding lost munitions is

__________ cause eutrophication

in sewage processing, level II treatment

dumping sludge causes environment concerns including

eutrophication harms marine ecosystems by

livestock sewage concerns are the same as human sewage concerns, although sometimes on a larger scale

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