Unclean air has been shown to lead to increased instances of several diseases, especially asthma (Takizawa, 2011) Forests help to reduce arbon dioxide in the air by sequestering the carbon during photosynthesis. These systems, if left to flourish, prevent flooding and provide humans access to clean water.Īir purification is another process essential to a healthy human civilization. The plants themselves remove larger contaminants like silt (NRPA, n.d.). As the water passes through the wetland, bacteria in the soil and vegetation eliminate significant quantities of nitrates and other pesticides. “Alluvial valleys,” made over time from deposits of gravel, fine sand, and peat, can then absorb large quantities of water and release them later into rivers. During heavy rainfall, water that flows into wetlands spreads out and naturally loses its velocity, allowing the environment to naturally filter toxins (EPA, 2010). Wetlands depend on the interlocking of all species present to function correctly and play an essential role in regulation of water flow and detoxification. This process cannot simply cease to exist, as “bees are more important than poultry in terms of human nutrition” (Tautz, n.d.). For instance, the pollination performed daily by bees and insects would be impractical for humans to attempt. It is important to note that the majority of ecological resources that biodiversity provides (see Benefits to Earth) are nearly impossible to replace.
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