Zebras

By Anonymous -
The poll you have recently taken has been removed

The answer is...

BLACK WITH WHITE STRIPES!!!

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Air Pollution (grade levels 4-8)

By Anonymous -
Air Pollution Next post in series Samuel Desai Many environmental activists, unlike me, like to say that pollution is an important issue. I prefer to categorize them into three different topics. Air Pollution, Water Pollution, Noise Pollution, and Light Pollution. The other types of pollution are for another week but don't worry, you will hear about them soon. You may believe that Carbon Dioxide (CO2) it the only pollutant, but it isn't. There are others. One type is methane gas, emitted by livestock and swamps. Another CFC's or chlorofluorocarbons which were used in refrigerators, hairspray, and many other things. But they were banned internationally in 2010 because of its deteriorating effect on the ozone layer. Personally, I think that the pollutant which harms us the most is sulfur dioxide. Sulfur Dioxide is a component in smog, but also reflects sunlight out into space, causing a global cooling. This may seem good, but sulfur dioxide is directly link...
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By: Sameer Mehta 1 Introduction How does clothing, paint, ink, plastic, fabric, cosmetics, food, and other materials get their color?  They get it from different types of pigments.  This article is going to let you know how green pigment was used to be made and how it is made now. Cobalt Green This pigment, was very expensive, and it couldn't tint well so is isn't commonly  commonly used. It was discovered in 1780 because of the preparation of zinc oxide. You can make it using a 1 to 5, cobalt to zinc ratio. Copper Resinate   This pigment, was used from the 1400's to the 1600's.  Emerald Green  This HIGHLY POISONOUS pigment was discovered  in 1808. It was one of the best pigments of the time, so they thought it would be best to kill people instead of having to "suffer" with bad paintings Green Earth This pigment, is an all natural one with the elements iron, magnesium, aluminum, and potassium. This pigment is still ...
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Our Waste-- How do we Dispose of it? | 4-8

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