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WG 4.1 Limits & Opportunities

Across
A giant wave usually caused by an earthquake beneath the ocean floor
The contamination of Earth's land, water, or air
A measurement of the number of people per given unit of land
Description of locations on Earth's surface where populations live
Down
Self-sufficiency farming in which the farmers focus on growing enough food to feed themselves and their families
Beliefs, customs, and traditions of a specific group of people.
A rapidly whirling, funnel-shaped cloud that reaches down to touch Earth's surface
A severe storm that develops over tropical oceans and whose strong winds of more than 120 km/h spiral in toward the intensely low-pressure storm center