Through afforestation, reforestation and cutting down agricultural emissions, by one estimate, carbon dioxide equivalent to 40 parts per million could be extracted from the atmosphere by 2050.

ECONOMIST: A special report on forests

For example, expanded credits for forestry-based offsets, including reforestation, afforestation and avoided deforestation, would give the rural poor a critical source of income to manage and sustain their landscapes.

ECONOMIST: On climate change, Bretton Woods, the Pope's speech | The