BENEFITS:
:check: revolutionised american industry.
:check: used so much steel, wood, leather, rubber and petrol that it provided jobs for more than 5 mill people.
:check: 90% of petrol, 80% of rubber and 75% of plate glass produced in the US was consumed by the car industry.
:check: transformed buying habits and made hire purchase the norm.
:check: promoted road building, travel, leading to motels and restaurants being built in places previously considered out of the way.
:check: production rose form 1.9 mill in 1920 to 4.5 mill in 1929.