Those figures don&#x27;t sound right to me, the US spends about 8% of it&#x27;s GDP on food, that isn&#x27;t likely to add up to 50-60% of emissions.<p>A carbon tax doesn&#x27;t have to harm the poor either, it can be neutral if it&#x27;s offset with tax decreases in other areas. There is even an argument that the developing world doesn&#x27;t raise enough tax, without taxes you can&#x27;t provide good health care to the poor.