Replacing crops with trees barely slows warming

CBC: A key climate change reduction strategy recommended by the United Nations won't have much effect on global temperatures, according to a couple of Canadian scientists. Afforestation involves planting trees over croplands that aren't very productive in order to absorb more carbon dioxide from the air. High emissions of carbon dioxide have been linked to climate change, especially rising average global temperatures. But even if 100 per cent of the area planted with crops now was gradually replaced......

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