Wao Kele o Puna
Wao Kele O Puna (Wao Kele) is Hawaiʻi's largest remaining lowland wet forest, about 15 mi (24 km) south of the city of Hilo, along the East Rift Zone of Kīlauea volcano on the Island of Hawaiʻi. The name means the upland rainforest of Puna. Puna is one of 9 districts on the island. Lava from Kīlauea continues to flow onto forest land.
In 2006, the Trust for Public Land (TPL) purchased Wao Kele, ending a twenty-year struggle to prevent tapping the sizeable geothermal energy resources that lie below it. Opponents believe that the area is the home of the fire goddess Pele. It is also known as the Puna Forest Reserve, located just east of the Puʻu ʻŌʻō vent at coordinates Coordinates: .
The state of Hawaiʻi owned Wao Kele until 1986, when the then Campbell Estate exchanged Kahaualeʻa, an adjacent forest parcel, for it at the state's request. Campbell Estate was a private, for-profit trust set up for the heirs of Scottish-Irish carpenter James Campbell, established in 1900 and dissolved in 2007. Campbell bought more than 84,000 acres (34,000 ha) of Hawaiʻi land before his death.
Environmentalists proposed the trade because they considered Kahaualeʻa to be in better condition than Wao Kele. The Pele Defense Fund, however, sued, arguing that privatizing Wao Kele would end traditional hunting and gathering by native Hawaiians. The suit led to a controversial Hawaiʻi State Supreme Court ruling that granted natives access to such private property.
In the 2006 transaction, TPL paid $3.65 million for Wao Kele, $131/acre, using $3.4 million in U.S. Forest Service Forest Legacy program money, along with $250,000 from the Office of Hawaiʻian Affairs (OHA). TPL then transferred title to OHA.
Geothermal energy 
Wao Kele is licensed for geothermal energy development until 31 January 2016. As of 2009, Hawaiʻi uses the permit only to monitor two existing geothermal wells. OHA has no plans for further development. The Hawaiʻi Legislature has provided $2 million to plug the existing TrueMid-Pacific well with sand and concrete in 2009.
The state of Hawaiʻi has substantial geothermal resources, which could dramatically reduce fossil fuel use and energy prices there if the energy can be extracted without damage to the surrounding environment and in accordance with Hawaiʻian law and culture. Geologists estimate that the Big Island alone has the potential to generate 500-700 megawatts of electricity.
Wao Kele came to the attention of geothermal developers after other privates sites became inundated with fresh lava from Kīlauea, at depths ranging up to 300 ft (91 m). Developers claim that 100 megawatts of power could be generated from only 300 of the forest's nearly 28,000 acres (11,000 ha), enough to provide all the electricity for the island's 175,000 residents.
Opponents cite the numerous health and safety problems experienced by an experimental state-run plant that closed in 1989, notably including toxic hydrogen sulfide gas emissions. A separate plant went online in 1993 in Puna's Lower East Rift Zone and continues to generate 25-30 megawatts of electricity. The natural increase in hydrogen sulfide and volcanic ash emissions due to volcanic activity within the Kilauea caldera at times produces sufficient vog to affect breathing on the nearby island of Maui.
The forest 
At 27,785 acres (11,244 ha), Wao Kele is Hawaiʻi's largest lowland wet forest. It is home to numerous primary and rare plant species including hāpuʻu ferns (Cibotium spp.), ʻieʻie vines (Freycinetia arborea), and kōpiko (Psychotria mariniana), some of which help to limit invasive species' incursions. ʻOpeʻapeʻa (Hawaiian hoary bat, Lasiurus cinereus semotus) ʻio (Hawaiian Hawk, Buteo solitarius), Common ʻAmakihi (Hemignathus virens), and nananana makakiʻi (happy-face spider, Theridion grallator) live in the trees. There are thought to be many more as-yet-undocumented species within the forest. Wao Kele's primary forest tree is ʻōhiʻa lehua (Metrosideros polymorpha) .
Wao Kele occupies approximately one-fifth of the watershed that feeds the Pahoa aquifer.
The Wao Kele o Puna Reserve is threatened by a number of invasive species, including strawberry guava (Psidium cattleianum), Molucca albizia (Falcataria moluccana), Koster's curse (Clidemia hirta), and glory bush (Tibouchina herbacea). Albizia occurs widely in the surrounding area, but is limited to a relatively small number of sites within the reserve. Large patches of strawberry guava occur within the reserve.
- Egan, Timothy (January 26, 1990). Energy Project Imperils a Rain Forest "Energy Project Imperils a Rain Forest". The New York Times. Retrieved September 16, 2009.
- Tindall, Ashley (September 1, 2007). "Wao Kele O Puna". Retrieved September 16, 2009.
- Thompson, Rod (August 28, 2007). "OHA takes control of Big Isle forest". Honolulu Star Bulletin. Retrieved 2009-11-06.
- Ruel, Tim (April 4, 2001). "Campbell Estate selling half of land holdings". Retrieved September 16, 2001.
- Borreca, Richard (September 13, 2005). "OHA to acquire Puna forest tract". Honolulu Star-Bulletin. Retrieved September 16, 2009.
- Thompson, Rod (July 20, 2006). "OHA buys Wao Kele forest land on Big Island". Honolulu Star-Bulletin. Retrieved September 16, 200.
- "Geothermal maps". Hawaii.gov. Retrieved September 16, 2009.
- Olson, Harry J. (January 29, 1992). "Preliminary Results and Status report of the Hawaiian Scientific Observation Hole program". University of Hawaii. Retrieved September 16, 2009.
- "Population, Hawaii County 2008 estimate". Retrieved September 16, 2009.
- "Puna Geothermal Venture". Retrieved September 16, 2009.
- "Frequently Asked Questions about Air Quality in Hawaiʻi". U.S. Geological Service. Retrieved September 16, 2009.
- Agreement Would Protect 25K Acres of HI Forest Trust for Public Land, September 12, 2005.
- Agreement Announced to Protect More Than 25,000 Acres Of Rainforest on Hawaii Island Office of Hawaiʻian Affairs, September 12, 2005.
- Protection of Wao Kele O Puna Celebrated, Office of Hawaiian Affairs