PacSci-Doku - "Natural Filter"
By Dennis Schatz - Vice President of Strategic Development

The question in this edition is:

What acts as a natural water filter?
The Answer - Wetlands

Scroll down to see the solution to our puzzle.
Wetlands connect the land to the water and go by many different names - bogs, swamps, marshes and sloughs. Some wetlands are obvious because they are always wet, but many are dry much of the year and only become wet during the rainy season.

Found along the edges of oceans, lakes, rivers and streams, some people think of wetlands as undesirable places that bread mosquitoes, spread diseases and emit smelly gases from decaying plants and animals. Consequently, more than half of the original wetlands in the United States were drained and converted to farmland, housing developments and industrial sites.

As we better understood wetlands, we realized they were critical habitats for many plants and animals and served as places for migrating birds to feed, rest and nest. But wetlands are not only critical to other plants and animals. Wetlands provide a place for floodwaters to go and slow the floodwater so there is less damage to human homes and lives. Wetlands also filter out pollutants, sediment and other undesirable substances before they reach the water at the edge of the wetlands. They are nature's natural water filter.

The Mercer Slough Environmental Education Center, a Pacific Science Center project in partnership with the Bellevue Parks & Community Services Department sits on the edge of one of the largest freshwater wetlands in the Puget Sound Area - The Mercer Slough. The new center’s new facilities are set to open September 13, 2008 and provide expanded opportunities to explore the many traits of this wonderful wetland. Find more information about the Science Center's programs at the
Mercer Slough Environmental Education Center.


Here is the solution:

PacSci-Doku


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