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Wetlands serve as some of the most complex and important ecosystems on Earth, providing habitat for many plants and animals, collecting and filtering water, and reducing the amount of damage from floods and heavy rainfal... More »

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Human activity affects ecosystems in a wide variety of ways, but it primarily does so through agriculture, habitat destruction, water use and fishing. Whenever humans enter a habitat, they tend to reshape it to fit their... More »

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The sun is important to Earth because it helps regulate the climate, is the main source of energy for producers in the ecosystems and it keeps the oceans from freezing, along with providing light. If just one of these fa... More »

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One of the biggest disadvantages of hydroelectric energy is the major disturbance that damming a river causes to the surrounding people, animals and habitat. Another problem is that dams and hydroelectric power plants ta... More »

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Ocean water is salty primarily due to the large amounts of chloride and sodium on land which are dissolved by rainfall and carried to the sea by rivers and streams. Hydrothermal vents and underwater volcanoes located on ... More »

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Heavy, consistent and prolonged rainfall coupled with the overflowing of rivers and other water channels is one of the main causes of flooding. As rainwater reaches and fills the river channels, the water spreads on the ... More »

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Bryophytes serve two important functions in an ecological sense: they absorb and release water in certain ecosystems, and they also release acids in other ecosystems. These functions help support certain organisms and ot... More »

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