Environmental

 Less cars need to be on the road. Less cars per family.
 Because the problem went bad when 'In 1995 Global Climate Coalition formed to spread propaganda against      
 climate change the members included #amoco #UsChamberOfCom, #gmMotors  sending out 1000s of false    
 information sheets to news aganecies. Boycott affiliated #BP_America #Buick #Chevrolet #Cadillac #Corvette. 
 There could have been electric cars then but also think industrial revolution has a huge play as well.