When water is too warm coral will eject the algae in their tissues making them turn white. It is a sign of stress and an indicator of poor health and even the death of the coral.
The economic and political alliance of most European countries.
The zone between protected wild land and land being developed.
A term describing how material becomes a resource when it is valued and traded, has a price equivalent, and it enters the arena of things bought and sold.
A large sea wave resulting from a tectonic shift.
A layer of soil that remains frozen all the year round.
A seasonal wind in South East Asia that blows from land to sea in October to May (dry monsoon ) and from sea to land on May to September bringing rain (wet monsoon).
A rapid increase in the number of people between the ages of 15 and 24.
A phenomenon in which areas that typically received greater amounts of precipitation become drier and take on characteristics more prevalent in desert climates.
The 750-mile active zone between he Pacific and North American plates that runs from San Francisco down to southern California.
An indicator used to describe and measure the number of distinct plant and animal species in a given geographical area.
A model of different stages that begins with high birth and death rates, moves through increasing birth rated and declining death rates to low birth rates and long life expectancy.
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