A giant slab of carbon-rich peat, discovered in central Africa, is under threat from uncontrolled development - posing a significant risk for future climate change, writes BBC Africa correspondent Andrew Harding.
After 10 hours by car, another 10 by river in a dugout canoe, three hours hacking a path with machetes through thick tropical undergrowth, then another two wading and clambering through a sweltering forest swamp, the scientists were finally ready to begin work.
Brushing away mud and mosquitos, they assembled a long, metal, corkscrew-like device, and thrust it deep into a patch of dark, water-logged earth.
Source: www.bbc.com
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