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Grades 9-12

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Online Resource

James Hutton: The Founder of Modern Geology

Until the late 18th century, most people believed the Earth was about 6,000 years old. Hutton changed this belief by proposing that geologic forces operate at the same rate today as in the past.

901a

Online Resource

Inge Lehmann: Discoverer of the Earth's Inner Core

Each one of the thousands of earthquakes that occur every year offers a brief glimpse of what's happening deep inside the Earth. Lehmann used seismic signals to change our knowledge of the Earth's core.

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Online Resource

Reefs in Crisis

Humans have harmlessly harvested coral reefs for thousands—or even hundreds of thousands—of years. So why has our behavior in recent years suddenly put reefs at risk?

907a

Online Resource

The Green Guerillas

From a humble start 25 years ago tossing seed-filled water balloons into abandoned city lots, the Green Guerillas have grown into an organization that has created and maintains 1,000 urban gardens.

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Online Resource

Wilderness Preservation Act

There are more than 260 distinct ecosystems in the United States. Yet only a little over half of them are in protected wilderness areas. What does it take to obtain "wilderness status"?

909b

Article

St. Lucia Parrot Recovery

In the mid-1970s, only 100 of these parrots were left in the wild. Learn how an international effort more than tripled the St. Lucia parrot population in 20 years.

909a

Online Resource

Restoration of the Elwha River

In a single century, the salmon population of Washington State's Elwha River shrunk by more than 99 percent. What caused this dramatic decline, and what can be done to turn it around?

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Online Resource

PROFILE: Penelope Bodry-Sanders

From acting on the Broadway stage to acting on her concerns about habitat destruction in Madagascar, Penelope Bodry-Sanders has had a wide-ranging and active career.

Online Resource

The Ethnobotany Reserve Project

Traditional healers are among those hurt by logging and development of the rain forest. In Central America, they've joined forces with farmers and scientists to preserve Belize's plant diversity.

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