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鈥� Africa Rising is a weekly look at business, investment, and development trends.

Fifteen years ago, Sierra Leone鈥檚 Gola Rainforest was at the heart of this West African nation鈥檚 brutal, decade-long civil war. Five years ago, the forest was under threat from mining companies that were looking for diamonds and iron ore beneath the fertile soil.聽

But as of Saturday, the Gola Rainforest, which lies within one of the world鈥檚 most important biodiversity hotspots, is now a national park. And it could soon bring Sierra Leone, one of the world鈥檚 poorest countries, a new income stream from the sale of carbon credits.

鈥淲e wanted to make Gola a conservation area, not a production area,鈥� says Kate Garnett, an assistant director in Sierra Leone鈥檚 Forestry Division.

The government鈥檚 Ministry of Mines issued two mining licenses inside the Gola Forest between 2005 and 2007, but Ms. Garnett says those licenses are not valid because they did not receive the Forestry Division鈥檚 approval.

鈥淲hatever licenses that were given have been canceled,鈥� she says.

Instead, the government hopes to generate some revenue from the forest by cashing in on the carbon that鈥檚 locked up inside all of those trees. They have calculated that, beginning in January 2013, the sale of carbon credits could generate about $1 million per year, which would be enough to cover the park鈥檚 annual operating costs.

Carbon financing 鈥渋s a win-win for the environment and for economic development,鈥� Sierra Leone鈥檚 president, Ernest Koroma, said on Saturday at the official opening of the national park in Lalehun, 15 miles from the Liberian border.

鈥淏y protecting our forest we can generate substantial income while retaining all of the natural benefits that a living, breathing forest provides,鈥� he said.

Scientists estimate that nearly one fifth of global greenhouse gas emissions come from deforestation. Schemes selling carbon credits for 鈥渞educed鈥� or 鈥渁voided鈥� deforestation have cropped up around the world in recent years, although many of those projects have come under fire for shoddy accounting or lax enforcement.

But carbon financing in the Gola Rainforest will be 鈥渁 gold standard project,鈥� says Jonathan Barnard, the head of the tropical forests unit at the Royal Society for the Protection of Birds, a British conservation group that has long supported Sierra Leone鈥檚 conservation work in Gola.

鈥淭he government has set the bar very high here. They鈥檙e aiming for what are currently the best standards out there for these sorts of projects,鈥� Mr. Barnard says.

Carbon dollars aside, the Gola Rainforest has plenty of value. The park鈥檚 175,000 acres are home to some 500 species of butterfly, 300 species of bird, and 45 mammal species, including chimpanzees and the endangered pygmy hippo.

The Gola Rainforest is also Sierra Leone鈥檚 largest remaining tract of forest within the Upper Guinea Forest ecosystem, which Conservation International has deemed one of the world鈥檚 34 biodiversity hotspots. Locally, the rainforest is an important source of water purification for the residents of the nearly 500 villages that lie near the park鈥檚 boundaries.

鈥淭he costs of losing what鈥檚 there are absolutely enormous,鈥� Barnard says.