North America
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Rapid growth of algae in lakes often due to the amount of run off high in phosphates and nitrogen from farms and lawns.

A major sailing route that linked Europe, Africa and the New World in the transport of goods and slaves.

A former industrial site affected by environmental contamination.

Glacial deposits of rock and sediment.

The use of violence to destroy a city.

A strong westerly wind several miles the globe. The shifting nature of jet streams is responsible for changing weather patterns.

The principle of political or commercial cooperation between the US and the countries of South America, as well as those in Central America and the Caribbean.

A storm of violently rotating wind.

The downsides of a heavy reliance on one or more primary commodities such as oil, that include corruption, wildly fluctuating government revenues and stunted economic development

Economies that heavily dependent on the exploitation of primary commodities such as oil and gas.

A tectonic plate boundary that runs from Vancouver Island to Northern California.

Narrow finger-like lakes formed by glacial action. Good examples are found in Finger Lakes region in New York State.

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