July 31, 1991

OIL-EATING BACTERIA

Scientists have been using microorganisms to accelerate the breakdown of oil on the polluted beaches of Alaska’s Prince William Sound.

July 30, 1991

AMAZON, BURNING OF THE – Climatic Change

Thousands of square miles of rainforest are burned and cleared every year. How will the deforestation of the Amazonian Rainforest affect the climate?

July 29, 1991

AMAZON, BURNING OF THE – Deforestation

Every year, an area about the size of the state of Massachusetts burns in the Brazilian Rainforest. Much of the deforestation is deliberate, to clear the land for crops.

July 26, 1991

FISH HATCHERIES FACE A CHALLENGE

When a deadly European fish virus hit American hatcheries for the first time, an intensive monitoring program was set up to isolate and trace the disease.

July 25, 1991

LAKE, PACIFIC NORTHWEST – Portrait

The words of Thoreau can still evoke the timeless feeling of a remote mountain lake in the late afternoon.

July 24, 1991

GLOBAL WARMING – Time Capsule Air

Scientists have found a way to sample and measure the Earth’s atmosphere from the distant past.

July 23, 1991

GLOBAL WARMING – The Prevention Scenario

Can the warming of the Earth’s atmosphere be stopped? What would it take to do so?

July 22, 1991

GLOBAL WARMING – Sea Level

If the Earth’s temperature continues to rise, flooding may eventually displace millions around the world.

July 19, 1991

GLOBAL WARMING – Models

Computers can project models of the long-term effects of global warming. But how accurate are they?

July 18, 1991

GLOBAL WARMING – Role of Forests

Forests around the world play a leading role in the regulating the Earth’s climate.

July 17, 1991

GLOBAL WARMING – A Cooler View

Not all scientists agree about the potential consequences of the Greenhouse effect.

July 16, 1991

GLOBAL WARMING – An Introduction

How do we know that global warming exists? How will it affect life on earth?

July 15, 1991

COMPOSTING-Secrets of

An expert shares some of the secrets of successful composting.

July 12, 1991

COMPOSTING – Automatic Composter

A new backyard composter can turn household garbage into topsoil in a matter of weeks.

July 11, 1991

COMPOSTING

As much as 80% of the average household’s garbage could be composted and turned into valuable topsoil.

July 10, 1991

AMAZON, PORTRAIT OF THE – Storm

In the summer afternoon, thunder shakes the darkening skies as heavy showers refresh the rainforest.

July 9, 1991

AMAZON, BURNING OF THE – The Brazilian Response

Using satellite photos as a map, the Brazilian government has begun to crack down on illegal burning.

July 8, 1991

AMAZON, BURNING OF THE – Satellite

Until recently scientists could only guess at the number of fires that swept through the Amazonian basin each year. Now, using satellite technology, they can monitor the extent of burning by tracking sources of heat.

July 5, 1991

AMAZON, FORESTERS OF THE – Slash & Burn

Fires are one of the most destructive forces in the Amazon, but the centuries-old “slash and burn” farming method, may actually help save portions of the rainforest.

July 4, 1991

GREAT SWAMP – The Watershed

As development encroaches on a wetlands preserve, the ecological balance within is shifted.

July 3, 1991

GREAT SWAMP – Portrait

A moment in sound: as a jet aircraft lands at a busy urban airport, a flock of geese splash down in an adjacent wildlife refuge.

July 2, 1991

PLASTIC, RECYCLING OF – Cars

When automobiles are scrapped,the high-grade plastic components can be recycled.

July 1, 1991

PLASTIC, RECYCLING OF – Types

Plastics can used in thousands of ways, but for recycling, there are just two basic types.