Dam (n) ? a natural or man-made barrier across a
river or stream that holds and controls the natural flow of water.
Decompose (v) ? to separate into parts; to rot or
Decomposition (n) ? decay of plant or animal
Desalinize (v) ? to remove salt and other
minerals, usually from sea water.
Desalination (n) ? the process of removing salt
and other minerals, usually from sea water.
Desert (n) ? an area of land, often sandy, that
has no rainfall, extreme temperatures and sparse vegetation.
Dolphin (n) ? Any of various marine mammals
related to the whales but generally smaller and having a beak like
Drought (n) ? a prolonged period of abnormally dry
weather, with little or no rain, that results in a shortage of water
which is severe enough to impact people, crops or the environment.