Uncertainty over climate and economy means ‘investment portfolio’ approach needed, researchers say

An “investment portfolio approach” needs to be applied to large-scale tree planting across the world to reduce the risks of the wrong species being planted in the wrong place, economists have said.

Countries have made ambitious pledges to plant billions of trees to remove greenhouse gases and tackle global heating. The UK has committed to plant 30,000 hectares (74,000 acres) of trees each year by 2025 and maintain the rate until 2050, the European Commission has pledged to plant 3bn trees across member states by 2030, and the US under the previous administration committed to planting 1bn trees by the same date.