When Were the Ice Ages?
The Ice Ages ended about 10,000 years ago after lasting about two million years. At its greatest extent the ice covered nearly 30 per cent of the land surface of the...
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What Is an Aerosol?
What Is an Aerosol? An aerosol consists of fine particles of liquid or solid substances suspended in the air, or in any other gas. It is not, as many people think,...
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What Is Global Warming?
Global Warming is the increase of Earth’s average surface temperature due to effect of greenhouse gases, such as carbon dioxide emissions from burning fossil...
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