Guardian: There is hope that next month’s Copenhagen climate conference will reach agreement on deforestation, slowing the chainsaw massacre of the rainforests. But the issue is not just one for the developing world. The fact that Britain cut down most of its woodland centuries ago is a reason for more action here, not less. A scientific study for the Forestry Commission, published on Wednesday, called for the mass planting of trees as a reliable and cheap way of soaking up carbon dioxide. If Britain …