This is what we’ve seen happen to cars, which have seen fuel efficiency double since the 70s, or air travel, which has seen 45% less fuel burn since the 1960s.
Hili ndilo tumeona likitokea kwa magari, ambayo yameona ufanisi wa mafuta maradufu tangu miaka ya 70, au usafiri wa anga, ambao umeshuhudia kuungua kwa mafuta kwa 45% tangu miaka ya 1960.