The Triangle accounts for one-third of the state's green energy projects, according to data issued this morning by the N.C. Sustainable Energy Association.

In the first-of-its-kind assessment of a still-emerging field, the Raleigh advocacy group's N.C. Clean Energy Data Book shows that the Triangle includes examples of all five types of green energy in this state: biomass, geothermal, hydroelectric, solar and even wind.

The Sustainable Energy Association issued the report to document for lawmakers, academics and the public the state's widespread adoption of green energy, largely in the past few years, since the General Assembly mandated green energy in a 2007 law.

The group is urging legislators to continue encouraging policies that promote green energy projects by offering state incentives and requiring electric utilities to guy cleaner forms of energy from independent producers.