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14 Sep

Planting trees not always an effective way of binding carbon dioxide

Tree-planting has been widely seen as an effective way of binding carbon as carbon dioxide levels rise in the atmosphere. But now researchers from the University of Gothenburg and elsewhere are warning that forests on nutrient-poor land won't be an additional carbon sink in the long term. As forests age, their uptake of CO2 declines and, each time forests are planted, there is a risk of additional carbon being released from the soil. The capacity of plants to bind carbon is a key factor in calculating the effects of climate change as carbon dioxide levels rise in the atmosphere. Scientists have now measured how much biomass grows under air with elevated CO2 concentrations in several long term field experiments. Growth stimulation was poor or...
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