Aquifer

Science / Geology / Aquifer: A subsurface rock or sediment unit that is porous and permeable. To be an aquifer it must have these traits to a high enough degree that it stores and transmits useful quantities of water.
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Aquifer (Artesian)

Science / Geology / Aquifer (Artesian): An aquifer that is bounded above and below by impermeable rock or sediment layers. The water in the aquifer is also under enough pressure that, when the aquifer is tapped by a well, the water rises up MORE

Aquifer (Unconfined)

Science / Geology / Aquifer (Unconfined): An aquifer that is not overlain by an impermeable rock unit. The water in this aquifer is under atmospheric pressure and is recharged by precipitation that falls on the land surface directly above the MORE

Aquifer (Confined)

Science / Geology / Aquifer (Confined): An aquifer that is bounded above and below by impermeable rock or sediment layers. There may or may not be enough pressure in the aquifer to make it an 'artesian aquifer'. MORE

Nonrenewable Resources

Business / Agriculture / Nonrenewable Resources: Nonrenewable resources, in contrast to renewable resources, do not naturally replenish themselves within time limits that permit sustained yield (i.e., minerals and hydrocarbons, such as phosphate roc MORE

Endangered Species Act (ESA) Of 1973

Business / Agriculture / Endangered Species Act (ESA) Of 1973: P.L. 93-205 (December 28, 1973), as amended, is one of the major federal laws protecting species and the ecosystems on which they depend. While states generally have primacy in wildlife law, this is o MORE