By: Elizabeth M Young
Lead is a metal with the symbol Pb. It is a soft, malleable metal that is bluish white, but which oxidizes to a dull gray when exposed to air. Yet lead resists further oxidation by creating an oxidation layer. When melted, it takes on a...
By: C. William White
What causes the Northern Lights? The Northern lights, or aurora borealis, are light displays in the skies that can be seen in the Northern Hemisphere especially near the Earth’s North Magnetic Pole. Currently the Pole is located in the arctic island regions of Canada...
What is the greenhouse effect?
By: Danielle Flesher
What is the Greenhouse Effect? The Greenhouse Effect is the rise in the Earth’s temperature that occurs when gases in our atmosphere trap energy from the sun. A visualization of this phenomenon: Imagine that Earth has been encircled by a giant glass sphere. The...
What is an aquifer?
By: Trayle Kulshan
An aquifer is defined as “a geologic unit which can store and supply significant quantities of water,” but that may not mean a lot to you unless you are a hydrogeologist. A simpler definition is anyplace underground which holds enough water to be...
Examining why global warming may be a myth
By: Lucien Beauley
Is Global Warming or Global Pollution the Issue?The news heard everywhere these days mentions "Global Warming", sometimes more than once per telecast. Our top environmental scientists are in agreement that the earth is experiencing a warming period. Are they forgetting a key point?Everyone...
By: Alex Bramwell
Wind power has a couple of fundamental flaws that must be overcome before it can become a major source of renewable power in the Western World. The first is that it is not a constant source of energy. If the wind doesn't blow, the...
By: Elizabeth M Young
Grasslands are under constant threat from nature and from anthropogenic activity. The current issues include development, overgrazing, riparian damage, and improper rotation or retirement of farming lands. The 2002 Farm Security And Rural Investment Act provided program funding for conservation of land that is used...
By: Elizabeth M Young
Invasive species are of increasing concern now, as global trade, global human migration and a taste for both exotic foods and pets has gotten out of control. The term "Invasive or alien species" covers all life forms, including animals, plants, zoonotic or other pathogens and...
What is the greenhouse effect?
By: Russell Waldron
The greenhouse effect is the phenomenon of the earth’s atmosphere trapping solar radiation. This is caused by the presence of gases such as water vapour, carbon dioxide and methane, which allows any incoming sunlight to filter through while absorbing heat which is radiated back...
By: Lenna Gonya
The greenhouse effect on the Earth is a combination of certain conditions that was first named because it was presumably similar to the atmosphere of a greenhouse. While it may be easier to understand when the two are compared, it isn’t exactly the same...

 

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