According to our study about half the total carbon 'land sink ' is in tropical forest trees , '' Lewis said . Nearly 5 billion tonnes of carbon absorbed by undisturbed tropical forests . Study found that trees in Africa are getting bigger . New carbon sink discovered in Africa that mops up 1 billion tons of CO2 . IPCC says each year humans emit 1 billion tonnes of CO2 .
Nearly 5 billion tonnes of carbon absorbed by undisturbed tropical forests . Study found that trees in Africa are getting bigger . New carbon sink discovered in Africa that mops up 1 billion tons of CO2 . IPCC says each year humans emit 1 billion tonnes of CO2 .