Wetlands face destruction due to threats such as commercial development, industry, urbanization, agriculture, invasive species, pollution, climate change and dams. It is estimated that approximately half of the world's wetlands have disappeared since 1900. The loss or alteration of wetlands is believed to contribute to global warming.Know More
Wetlands are a type of ecosystem characterized by either a seasonal or permanent saturation of land by water, which can either be fresh, brackish or salt. Aquatic plants and other vegetation specific to wetlands are another defining characteristic, as they are fully adapted to the exclusive hydric soil. Wetlands are useful to the environment due to their ability to purify water, provide stability to shorelines, serve as a home for a variety species and act as a buffer for floods. Examples of wetlands include swamps, bogs, marshes and fens. Climate varies based on location, but wetlands are present on every continent with the exception of Antarctica. Of all ecosystems, it is believed that wetlands face the most environmental degradation.
Around half of the world's human population relies on wetlands for their freshwater needs. Wetlands also serve as a significant source of protein and are often used as fisheries. Conservation efforts within the United States are centered around building artificial wetlands to offset the loss of those from industry and commercial interests.Learn more about Human Impact
Some causes of environmental destruction include using biomass fuels, rearing domestic and farm animals, contamination from hydrofracking and urbanization. How each action affects the environment depends on what surrounds it. For example, wastewater entering wetlands can cause them to age.Full Answer >
One of the biggest threats to the tundra is global warming. As fossil fuels burn elsewhere on the planet, the atmosphere warms in all locations. This causes melting of permafrost, resulting in the collapse of tundra ecosystems. As permafrost melts, it allows frozen plant material to decay, releasing more carbon dioxide and accelerating global warming, according to Marietta College.Full Answer >
Erosion effects humans by adding additional toxic organic chemicals and heavy metals to the soil as well as eroding land so that there is less land to farm on. Humans are accelerating the rate of erosion.Full Answer >
A positive human impact on the environment occurs when a person takes action to improve society, nature and its resources. Acting positively, even in a small manner, has a major impact on the environment, especially when it is done consistently.Full Answer >