A proposal to build a hotel and conference center in Fontainebleau State Park near Mandeville has yet to receive a public vetting - that comes Wednesday night - but is already generating controversy among some north shore residents and environmentalists. Opponents have cited several concerns, ranging from the prospect of more development at the 2,800-acre park on the shores of Lake Pontchartrain and the lack of local input in planning to the specter that the proposed resort will eventually include a gambling casino.

Despite the valuable role that mangroves and seagrass play in the Florida Keys ecosystem, these plants are facing one particularly large threat: Us. In the Florida Keys, human development is the greatest threat to mangrove communities. Since the 1950s, more than 60 percent of mangroves in Monroe County have been destroyed for development. Activities such as dredging, using herbicides, and increasing waste water runoff have destroyed thousands of acres of mangrove habitat.

Wetlands are areas where water covers the soil, or is present either at or near the surface of the soil all year or for varying periods of time during the year, including during the growing season. Water saturation (hydrology) largely determines how the soil develops and the types of plant and animal communities living in and on the soil. Wetlands may support both aquatic and terrestrial species. The prolonged presence of water creates conditions that favor the growth of specially adapted plants (hydrophytes) and promote the development of characteristic wetland (hydric) soils.

Natural land-building deltaic processes of the Mississippi River Delta have been severely limited by artificial river levees, which prevent water and sediment from flowing over the banks during spring floods. To counteract the effects of severing the connection between the river and the delta, focus has been placed on reconnecting the river to the surrounding wetlands by the creation of artificial outlets, also called diversions.

Marine debris is litter that ends up in oceans, seas, or other large bodies of water. This manmade debris gets into the water in many ways. People often leave trash on beaches or throw it into the water from boats or offshore facilities, such as oil rigs. Sometimes, litter makes its way into the ocean from land. This debris is carried by storm drains, canals, or rivers. The wind can even blow trash from landfills and other areas into the water. Storms and accidents at sea can cause ships to sink or to lose cargo.

Land was chosen and a road was developed, but the grocery store was never built after the Army Corps of Engineers changed the wetlands mitigation rules. The deal fell victim to stringent new requirements by the Army Corps of Engineers that forces developers to pay more to offset the loss of wetlands in new construction projects. And with much of St. Tammany Parish -- even the acres of pine forest that appear high and dry to the naked eye -- classified as wetlands by the corps, local leaders fear the tough new restrictions will stifle growth for years to come.

The Sand Motor is a nature-based alternative to the Netherlands' famed network of walls, levees and sea gates, and much cheaper than the vast, multimillion-dollar beach rebuilds Louisiana is undertaking along its sandy barrier islands and rapidly deteriorating coastline. Where Louisiana's projects seek to re-create almost precisely what was lost, the Dutch simply pile the sand in a strategic location where it will be pushed naturally into places where it will still provide protection.

Water-quality samples collected from drainage canals, from Lake Pontchartrain, La., and from flood waters contained contaminants typically found in waters influenced by urban runoff. Pesticides and wastewater compounds were detected in all water samples, but none exceeded U.S. Environmental Protection Agency (EPA) drinking water or aquatic life criteria. Although metals were detected in all samples, copper, nickel, and silver occurred in concentrations greater than water-quality criteria for salt water.

Streams, rivers, wetlands and lakes are home for many small animals called macroinvertebrates. These animals generally include insects, crustaceans, molluscs, arachnids and annelids. The term macroinvertebrate describes those animals that have no backbone and can be seen with the naked eye. Some aquatic macroinvertebrates can be quite large, such as freshwater crayfish, however, most are very small. Invertebrates that are retained on a 0.25mm mesh net are generally termed macroinvertebrates.

This widespread problem of water pollution is jeopardizing our health. Unsafe water kills more people each year than war and all other forms of violence combined. Meanwhile, our drinkable water sources are finite: Less than 1 percent of the earth's freshwater is actually accessible to us. Without action, the challenges will only increase by 2050, when global demand for freshwater is expected to be one-third greater than it is now. Still, we're not hopeless against the threat to clean water.