Assignment Earth Video

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In Grand Teton National Park, volunteers help to manage congested roadside "wildlife jams" and patrol campgrounds to avoid dangerous bear-human conflicts.

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Living inside wildlife reserves in India, tribal people suffer from attacks by bears, wild boars, elephants and snakes much more frequently than by tigers and leopards.

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A prison in Kenya goes green, using sustainable systems including biogas produced by waste material, replacing fuelwood.

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White-nose syndrome (WNS) is a poorly understood condition that, in the two years since its discovery, has spread to at least seven northeastern states and killed as many as half a million bats.

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Mumbai is a large, bustling, crowded city. But little known is that it also hosts one of the world's largest populations of flamingos.

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To protect a spectacular mountain chain in western Wyoming, a new federal law blocks oil and gas leasing and allows conservationists to buy drilling rights on existing leases.

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Counting and banding wild Canada geese in Kentucky is an essential step in setting the limits and length of the hunting season that keeps their numbers in check.

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Monsoon rains have brought relief in some areas, but the worst drought in memory has shown the need for serious water conservation measures.

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Sea lions, seals and penguins traumatized by pollution or fishermen's nets are saved by volunteers and charitable foundations patrolling Argentina's coast.

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Wolves have spread out in the Rocky Mountain states under federal protection, but could eventually face a deadly free-fire zone covering most of Wyoming.

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From Maine to Georgia, scientists use desperate measures to stop invasive insects from destroying vital hemlock forests.

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A rancher in Guatemala is restoring a rainforest, one seedling at a time.

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Once a busy cargo transportation hub, the Gowanus Canal is now a contaminated waterway that neighboring residents and government authorities are determined to clean up and revive.

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An Iowa company bets its future on building huge, utility-scale wind turbines for the promised "green revolution."

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In the congested traffic of Mumbai, a new breed of bicyclists are changing the image of the bicycle as a poor man's transport.

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Clear, cold, and filled with life, this special waterway is protected by towns using new ultraviolet treatment instead of poisonous chlorine to treat their sewage.

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In the Western Ghats mountains range along the western side of India, a rare bat species and a unique cave ecosystem teeming with other wildlife are threatened by the planned construction of a hydroelectric dam.

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Protected by the Endangered Species Act, Aleutian geese have made a spectacular recovery - causing serious problems in California as they graze by the thousands in farmers' fields.

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India's government has spent millions to clean up the Yamuna River, but it remains one of the world's most polluted waterways, flowing through the capital and past the Taj Mahal.

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In West Virginia, critics warn public health and safety are threatened by coal waste from processors that is stored in hundreds of slurry ponds or injected underground.

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In a major discovery for the survival of the species, researchers have found huge numbers of endangered leatherback turtles nesting along Gabon's Atlantic coastline.

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Greenery for floral displays can be bought from certified suppliers, protecting forests and local communities that depend on them.

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Certified "green tourism" protects natural and cultural resources and pays fair wages to workers.

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Buying coffee grown by certified farms guarantees environmental, social and economic sustainability.

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Buying certified wood products encourages regulated, sustainable logging that actually saves more trees than total protection.

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Levees are intended to keep straitjackets on rivers, but engineers now find that controlled breaches can avoid more widespread damage to occupied areas in flood-plains.

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Side-by-side in harsh conditions, scientists from 46 nations work together to understand what lies ahead for the "White Continent".

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Climate change threatens the natural balance in Antarctica - a rapid barometer of the global outlook.

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Adventure tourism is skyrocketing in Antarctica, creating serious risks in a fragile ecosystem.

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Off California's coastal wetlands, sea otters are catching a lethal land-borne disease from cats.

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Climate change is causing big storms in the American Midwest and other areas, and making water supplies in regions like the Southeast less certain.

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Some of the world's tallest trees and oldest forests face an uncertain future as the current recession worsens.

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New federal funding in the U.S. supports protection of private forest lands threatened by development.

In Guatemala, villagers get fair wages to harvest palm fronds sustainably, for export to U.S. churches.

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The U.S. Congress has passed a sweeping law that permanently establishes the protection of 26 million acres of public lands with special scenic, historic and ecological significance.

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With bits of evidence, researchers are convinced Ivory-billed woodpeckers are not extinct and will soon be found in the swamps of northern Florida.

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To guide habitat restoration in backwater lakes on the upper Mississippi, Iowa researchers track fish with radio transmitters.

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On the Mississippi between Illinois and Iowa, hundreds of bald eagles are now attracted each winter by plentiful fish in ice-free waters.

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New research shows how fragments of lead rifle bullets are poisoning eagles, bears and other wildlife that scavenge carcasses left by hunters.