What type of pollution can you find in cities?

What type of pollution can you find in cities? There are different types of pollution: water pollution, air pollution, solid waste pollution and noise pollution. All of these can be found in urban areas. The main sources of pollution are household activities, factories, agriculture and transport. What is city pollution? Cities are major contributors to […]

How much of Earth is magma?

How much of Earth is magma? More than 80 percent of the Earth’s surface–above and below sea level–is of volcanic origin. Gaseous emissions from volcanic vents over hundreds of millions of years formed the Earth’s earliest oceans and atmosphere, which supplied the ingredients vital to evolve and sustain life. Does magma ever run out? A […]

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