Mwakitau Kaleghe used to scratch out a living from burning charcoal, culled from trees whose felling helped turn a rich tropical woodland in southern Kenya into a desolate mosaic.

Today, though, sees Mr Kaleghe, 65, enlisted in an environmental war, as a captor of carbon rather than an emitter of it and as a custodian of Rukinga forest rather than an agent in its destruction.

Mr Kaleghe nurtures tree seedlings that he then sells to a UN-backed project carbon-credit project. Trees suck up carbon dioxide (CO2), the principal greenhouse gas that traps solar heat.

Under the Reducing Emissions from Deforestation and Degradation initiative, CO2 emitters in industrialised countries can “offset” their pollution by conserving tropical forests or replanting cleared or damaged areas.

Wildlife Works, a US conservation group, says 30,000 hectares of forest are under its wing in the Rukinga REDD scheme.

It has sealed a deal with South Africa’s Nedbank group, keen to establish “carbon-neutral” credentials, for the sale of 200,000 tonnes of CO2 for around one million dollars.

Some of the proceeds are earmarked for local projects to give the community alternative sources of income other than clearing land for subsistence farming and charcoal burning. “If they buy the seedlings at a good price, I think we can make ends meet,” said Mr Kaleghe.

“I used to make good money from selling charcoal but I won’t start making charcoal again because that is destroying the forest.”

Eventually, 30 million tonnes of CO2 will be saved over 20 years, Wildlife Works hopes. Reforestation should also be a boon for biodiversity. The forest straddles the east and west sides of Tsavo National Park, Kenya’s largest, and its renewal eventually will provide a corridor for migrating wildlife.

The strategy also involves the community, which forms committees to choose the most important projects they want funded. In this arid region, water tops the list, then roads, education or health.

Rob Dodson, who heads Rukinga Wildlife Works, said he saw widespread support from local people who had been aware, bit by bit, of the degradation of the forest and its impact on their lives.

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