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How does land change? Natural vs. Man-made causes
Transcript of How does land change? Natural vs. Man-made causes
a natural physical feature of the Earth's surface, a valley, mountain, or plain. Bodies of water are places where water accumulates to the point that it is a distinct feature of the land. Soil is the top layer of most of the Earth's land surface, consisting of the unconsolidated products of rock erosion and organic decay, along with bacteria and fungi. Vegetation is plants in general or the mass of plants growing in a particular place. Recycling is saving for reprocessing: the saving or collection of used or waste material for reprocessing. Reusing is the use of something again, often for a different purpose and usually as an alternative to throwing it out. Conserving is to protect something from harm or decay: to keep something, especially an important environmental or cultural resource, from harm, loss, change, or decay. In 1985, a volcano in Columbia erupted resulting in 20,000 people dead. Because of the eruptions, four towns in the Andes region were buried, the worst being Armero. Nevado del Ruiz, known locally as "the Sleeping Lion", had not erupted for nearly 150 years. This eruption was the second most deadly eruption in the 20th century. Nevado del Ruiz remained active for several more years, resulting in eruptions in 1991 and 1992.