Oh, there are plenty. First of all, actual energy production with fossil fuel. Second, better insulation/ventilation of existing houses to reduce heating/AC cos

Oh, there are plenty. First of all, actual energy production with fossil fuel. Second, better insulation/ventilation of existing houses to reduce heating/AC costs. While we are at it, we can fit solar panels on roofs, it will give us more electricity hence less fossil fuel to burn. Electric cars too, the tech is already there. Steel production (and other heavy industry) accounts for 8% of global emissions afaik. Meat production estimates vary a lot: from 9% to 35% or so. I know it is very controversial, but I'd rather go vegan than give up air travel.