The fertile green funds market may sprout an index of its own. New York-based Nasdaq and Clean Edge, a clean technology consulting firm with offices in Oakland, Calif., and Portland, Ore., announced on Tuesday plans to launch a Clean Edge U.S. Index.

The index, which is scheduled to launch on May 18, will follow clean energy companies that are publicly traded in the United States.

"The index will bring much needed attention, focus and definition to a sector that is already playing a lead role in addressing the global energy crisis," said Nasdaq Executive Vice President John Jacobs.

Examples of such companies may include those involved with the manufacturing, development, distribution and installation of clean energy technologies that rely on energy sources such as solar power or fuel cells.

"This index represents the further advancement, maturing, and mainstreaming of the clean-energy sector."

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