Earth Science

How Earthquakes are Caused

Many places on the planet experience earthquakes, either on a regular basis or infrequently. Earthquakes occur in specific areas of the Earth’s crust where “faults,” or cracks lie. These faults experience changing temperatures and pressures within the layers of the…
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An Outline of the Main Air Pollutants

Air pollutants are chemicals emitted into the atmosphere, as a result of human activities, which have negative consequences for humans or the environment. According to the United States Environmental Protection Agency (EPA), the six main pollutants are ozone, particulate matter, carbon…
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Worst Typhoons in Asia

Typhoons, cyclones and hurricanes are all just different nomenclature for the same meteorological phenomenon – a migratory, super low pressure system that draws its power from the sea and unleashes it on land in the form of beating rainfall and…
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Worlds Largest Cities

In 2009, cities are more important to the global system than ever. Urbanization is spreading, with people moving from villages and farms into towns and cities. It is estimated that half of the world’s population now lives in urban areas….
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