JILL MIKUCKI: "We have a lot to learn from the microbes that survive in these kinds of environments and have adapted to these cold, low-energy systems.

VOA: special.2009.06.03

"By suddenly having an actual mechanism to value these systems in dollars, it gives you a potentially very large new mechanism for countering the other financial and economic arguments."

VOA: special.2011.05.10

These cave systems form in carbonate rock, often on islands.

VOA: special.2010.11.10

He says these improved systems will be gradually deployed, starting in about 2011.

VOA: standard.2009.09.17

According to Ben Urbonas, president of the Urban Watersheds Research Institute, these nutrient contaminants tend to be more of a problem in closed water systems,like lakes, where concentrations can build up.

VOA: standard.2010.08.04