A mid-ocean ridge or mid-oceanic ridge is an underwater mountain range, formed by plate tectonics. This uplifting of the ocean floor occurs when convection currents rise in the mantle beneath the oceanic crust and create magma where two tectonic plates meet at a divergent boundary.
<span>The GDP calculation also accounts for spending on exports and imports. Thus, a country's GDP is a measure of consumer spending (C) plus business investment (I) and government spending (G) as well as its net exports, which is exports minus imports (X-M).</span>Apr 24, 2017<span>
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Primary Consumers are also known as the ones who eat plants . They are usualy herbivores
Poor air and water quality, insufficient water availability, waste-disposal problems, and high energy consumption are exacerbated by the increasing population density and demands of urban environments. Strong city planning will be essential in managing these and other difficulties as the world's urban areas swell.
