October 31, 1991


Should there be a criteria for whether or not a species is worth preserving?

October 30, 1991


When people drive mountain lions out of their traditional territories, the loss of a predator has a ripple effect on all the remaining species.

October 29, 1991

OCEAN BOTTOM – Diversity

Beneath the surface of the ocean lives a variety of life that rivals the most populous rainforests.

October 28, 1991


Over the centuries, birds in Hawaii’s tropical rainforest adapted to their volcanic surroundings. But the introduction of non-native species threw the bird population out of balance.

October 25, 1991

EAGLES – A Symbolic Comeback

Bald Eagles, once on the verge of extinction, are not just symbols of our country. They also represent the need to protect the environment, and the wildlife that depends on it.

October 24, 1991

ACID RAIN – The City

What is acid rain and what happens when it falls in urban areas?

October 23, 1991


Monuments that have stood for thousands of years now face a new environmental threat.

October 22, 1991

VALUE OF THE RAINFOREST – Renewable Resources

Scientists seeking to save the rainforests are now learning what native Amazonians have known all along: carefully managed, a forest can yield a multitude of profitable and renewable crops.

October 21, 1991


Rainforests the world over are being cut down for timber or cattle pastures. But scientists have found that in the long run, the the forests are worth more if left standing.

October 18, 1991


Major tuna companies recently agreed to stop buying fish caught with driftnets that harm dolphins. However, dolphins won’t be safe until their entire environment is protected.

October 17, 1991


Some parts of New York City were meant to be wild. Keeping them natural takes a lot of work.

October 16, 1991

NEPAL 2 – The Culture Factor

Environmental projects in other countries often fall to the customs of indigenous people.

October 15, 1991

NEPAL – Deforestation

Deforestation in the Himalayas has been responsible for a vicious cycle of erosion and flooding.

October 14, 1991

RECYCLING 3 – Glassphalt

New York City’s Great White Way may indeed sparkle at night–thanks to recycled glass.

October 11, 1991


It may be possible to make polluted water as pure as a mountain stream, with a cleansing system that uses plants and fish.

October 10, 1991


Ecological engineering sees any form of waste as a resource out of place.

October 9, 1991

GREAT LAKES – Water Quality

One-fifth of all the freshwater in the world is contained in the Great Lakes — but that’s not enough to wash away the effects of years of pollution.

October 8, 1991

GREAT LAKES – Aquatic Invaders

When ships enter the Great Lakes, they often bring with them underwater stowaways that can take over their new environment.

October 7, 1991


In Thailand, a village is attempting to revive land left barren by deforestation.

October 4, 1991

RAINFOREST – Fragmentation

Slowly but surely,the Amazon is turning into a patchwork of barren and forested land . How much room does a rainforest and its inhabitants need in order to survive?

October 3, 1991


The Amazonian rainforest is so vast, and so rich in species, scientists say that if that if its destruction continues, we may never know how much we’ve lost.

October 2, 1991


As many as ninety percent of all the species in the world may live in rainforests.

October 1, 1991


The effects of toxic chemicals continue to haunt the environment.