Waterton Lakes

This is the head of one of the Waterton Lakes. Here, where the majestic Rocky Mountains rise suddenly out of the rolling prairies, is found amid the peaks, the lakes of Waterton Lakes National Park carved out of the rock by ancient glaciers. Alberta's Wat

Point Source Water Pollution

Point source water pollution.

Peruvian altiplano

The Peruvian altiplano is a high plateau ranging in altitude from 3500 to over 4000 meters above sea level. Though the altiplano is a cold, harsh environment, large herds of hardy llamas such as these hint at the richness of South America's high grassland

Mangroves

Mangrove roots serve as critical habitat for many species and nutrient filters.

Wind Power Generators

This area in Tehachapi, California is one of the world's leading wind energy producers. Prevailing northwesterly winds blow through passes in the Tehachapi Mountains that connect the San Joaquin Valley with the Mojave Desert. The best winds occur from Mar

Tundra wildfire

Tundra wildfire caused by lightning Kugruk River Valley summer of 1977. Northeast Seward Penninsula, Alaska.

Clearcut forest

Clear-cut forest.

Wildfire

Image from the Bitterroot National Forest in Montana during August of 2000. The picture shows two elk standing in a stream seeking shelter from the rapidly-spreading flames. The fires here merged with the Mussigbrod wildfires to burn more than 247,000 acr

Oregon sea coast

Sea coast at Oregon.