A legal landfill is a carefully engineered depression in the ground into which wastes are put. ... The three other elements must be engineered. ... Diffusion will move organic chemicals like benzene through a three-foot thick clay landfill liner in approximately five years. Some chemicals can degrade clay. ... A number of household chemicals will degrade HDPE, passing though it making it lose its strength. ...

• Word Count: 2170
• Approx Pages: 9
• Has Bibliography
• Grade Level: High School

Other fuels range from organics such as soybeans to chemicals such as solid oxide alkalines, phosphoric acid, and direct methanol fuel cells. ... If engineers and city planners could design citites to be more centralized and 4 organized to allow for more walking and mass transit, then reliance on cars would decline. ... American designers and engineers would have to design cities in an efficent manner where it would be easier for a person to walk down the cornerstore without driving and not rely so much on cars to get ever...

• Word Count: 1292
• Approx Pages: 5
• Grade Level: High School

Iraq and Weapons of Mass Destruction The evidence published by a number of think tanks and governments indicates that Iraq still has chemical and biological weapons and that it could one day develop a nuclear device. Richard Butler, former United Nations (UN) weapons inspector, warns that Iraqi president Saddam Hussein is actively developing weapons of mass destruction and has stepped up the production of biological and chemical agents since inspections ended four years ago. ... Iraq could have nukes by 2005 A former Iraqi nuclear engineer told a senate hearing Wednesday ...

• Word Count: 975
• Approx Pages: 4
• Grade Level: High School

"Switzerland traded machine tools, pharmaceuticals, chemicals, electrical power, and small arms with Germany" (The New Republic, PG 2). ... Also due to the Swiss" great engineers they could make factories inside of mountains so that planes could not see them. ... They also traded explosives and detonators, which were very sophisticated due to the Swiss" great engineers. ...

• Word Count: 1418
• Approx Pages: 6
• Has Bibliography
• Grade Level: High School

To start with a nuclear reaction contains a million times more energy than a rapid oxidation chemical reaction for example it takes a little less than a pound of coal to power a 100 watt light bulb for 24 hours. ... First of all it must be noted that compared with chemical reactions, nuclear reactions are much less likely to occur. ... Scientist and engineers at MIT are currently researching Silicon Carbide as a replacement cladding for nuclear fuels in the United States. ...

• Word Count: 1702
• Approx Pages: 7
• Has Bibliography
• Grade Level: High School

When most people think of wetlands the first thing that will pop into their mind will be visions of swamps and flooded plains. These marshy lands would seem to have no purpose, while in reality they are the most precious forms of ecosystem that we have in America. Wetlands contribute to biodiversity, clean water, flood control, and provide a habitat for millions of species of plants and animals. Even with all this wetlands still face mass destruction, much like the rain forests they are just as productive and face similar rates of devastation (Mitchell, J. (1992, October). "Our Disappearing We...

• Word Count: 6040
• Approx Pages: 24
• Has Bibliography
• Grade Level: High School