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#1 ....................... A Publication Of SchoolNet Global
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What is an Ecological Footprint?
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The concept of an ecological footprint was put forward by Matthias Wackernagel and William E Rees in their 1996 book 'Our Ecological Footprint: Reducing Human Impact on the Earth'. To find out more, click the image above. Would you like to calculate your own Eco Footprint? More>>
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Marine Ecosystems - Race Rocks
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There is a very special place on the net that is the work of Pearson College in Victoria, B.C. Canada. Their site has some of the best information on a thriving but fragile marine ecosystem in Juan De Fuca Strait. Also, they have great video archives that allow you to go on a virtual field trip to Race Rocks. Click on the image to go the Race Rocks site on the Apple Learning Interchange or click on more to go directly to RaceRocks.com. More>>
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What causes Global Warming?
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There are several gases in the air, collectively called greenhouse gases, that trap the infrared radiation emitted from the Earth.
Although these gases make up a small percentage of our atmosphere, they significantly affect the amount of infrared light energy leaving the earth. Therefore, they disrupt the heat budget and are a cause of global warming. More>>
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What is the Nature Challenge?
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The David Suzuki Foundation has researched the 10 most effective ways we can help conserve nature. Pick at least three and promise to do them over the next year. It's that simple. More>>
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Clean Energy from Wind
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Wind energy has come of age as a source of electricity.
From the mountain passes of California to the shores of the North Sea, wind turbines are now producing commercial quantities of electricity without the emission of global warming gases.
Wind energy is actually an indirect form of solar energy -- the wind is mainly driven by temperature differences on the earth's surface caused by sunlight. Uneven warming of the atmosphere results in rising and circulating air currents which can be used to generate electricity. Wind turbines, usually with just two or three blades, collect kinetic energy from the wind, which drives a generator and produces electricity.
Wind turbines are placed on towers where the wind blows harder and more steadily. The longer the blades -- up to 82 feet -- and the faster and more constant the wind speed, the more electricity the turbines generate.
More>>
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Clean Water is the Gift of Life!
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Water ... worth more than gold and necessary for survival above all other resources on earth.
And yet, over one billion men, women, and children (more than four times the population of the United States and Canada combined) do not have safe water to drink and therefore cannot live a healthy life.
Who are these people? More>>
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