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a mucilaginous commercial product of multicellular algae; widely used as a thickening an emulsifying agent
the growing or farming of plants and animals in a water environment under controlled conditions
the ability of some organisms at higher levels in the food chain to concentrate toxic substances in their flesh
the most abundant and dangerous class of halogenated hydrocarbons, synthetic organic chemicals hazardous to the marine environment
a set of physical, chemical, and biological changes brought about when excessive nutrients are released into water
the farming of marine organisms, usually in estuaries, bays, or nearshore environments or in specially designed structures using circulating seawater
marine energy resource
any resource resulting from the direct extraction of energy from the heat or movement of ocean water
the introduction by humans of substances or energy into the ocean that changes the quality of the water or affects the physical and biological environment
maximum sustainable yield
the maximum amount of fish, crustaceans, and mollusks that can be caught without impairing future populations
any use of the ocean in place, such as transportation of people and commodities by sea, recreation, or waste disposal
any resource that is present on Earth in fixed amounts and cannot be replenished
harvesting so many fish that there is not enough breeding stock left to replenish the species
any resource that has resulted from the deposition, precipitation, or accumulation of a useful nonliving substance in the ocean or seabed
a substance that causes damage by interfering directly or indirectly with an organisms biochemical processes
(polychlorinated biphenyls) chlorinated hydrocarbons once widely used to cool and insulate electrical devices and to strengthen wood or concrete. They may be responsible for the changes in and declining fertility of some marine mammals
any resource that is naturally replaced on a seasonal basis by the growth of living organisms or by other natural processes
semisolid mixture of organic matter, microorganisms, toxic metals and synthetic organic chemicals removed from wastewater as a sewage treatment plant
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