Calculating how much carbon is absorbed by which forests and farms is a tricky task, especially when politicians do it.

Calculating how much carbon is absorbed by which forests and farms is a tricky task, especially when politicians do it.

计算森林和农场吸收了多少碳是一项棘手的任务，尤其是当政客们这样做的时候。

-- Donella Meadows 梅多斯