The Papermaking Industry: Mechanical Pulping
Mechanical pulping methods avoid many of the environmental impacts created by the Kraft pulping process. Several different mechanical pulping methods are commonly used today, but they all rely primarily on energy rather than chemicals to convert wo...
Running Out of Energy
Paul Ehrlich, best known for his work on population growth, explores the issue of energy and availability of fossil fuels. According to Dr.Ehrlich, the biggest threat posed by reliance on such fuels is not running out of them but, rather, their nega...
Good Health
Dr. Andrew Leuchter, Director of Adult Psychiatry at UCLA, talks about what constitutes good health. Dr. Leuchter explains that good health means not only feeling good, but being able to engage in activities fully and without restriction.
Treating Depression: First Steps
Dr. Andrew Leuchter, Director of Adult Psychiatry at UCLA, talks about first steps in treating depression. Initially, Dr. Leuchter explains, doctors look for symptoms that often accompany depression, such as problems with sleep, energy, appetite, se...
Recognizing Depression
Dr. Andrew Leuchter, Director of Adult Psychiatry at UCLA, talks about the differences between what he calls, "...normal ups and downs," and depression. Dr. Leuchter says that when someone is down for weeks at a time, "...that's when we start to thi...
Treasure Trove: Commercial Uses of Sediment
Marine sediments are enormously important economically. Gravel and sand are obtained from the ocean for use as construction materials. In addition to offshore diamond deposits, tin and titanium are found in the ocean. Oil and natural gas resources a...
Surf's Up: Shoreline Effects of Wind Wave Energy
Nearly all of the effects of wind wave energy are felt along the shoreline, often in the form of erosion. The erosion process on the shoreline moves sand from one place to another and, over time, actually changes the orientation of the coast.
Alternative Sources of Energy
Paul Ehrlich, best known for his work on population growth, discusses solar hydrogen technology as an alternative to fossil fuels and nuclear energy.
Managing Change Case Study: Fluor Corporation, The
The Fluor Corporation was for years one of the largest engineering and construction companies in the world, employing close to forty thousand people. But by the mid 1980s, faced with crippling financial losses following the collapse of its engineeri...
Biological Treatment Technologies: Microorganisms and Metabolism
From the polar ice caps to the bottom of the sea, microorganisms that provide the backbone of biological treatment are becoming our greatest ally in the quest for a cleaner environment. The microbial kingdom is comprised of organisms ranging from s...