Detroit Motor Show: To go big or to go green?
13 January 2015 Last updated at 11:34 GMT
There have been plenty of fuel-efficient, green cars on display at this year's Detroit Motor Show.
However, with a six-year low in oil prices, the affordability of large trucks and sport utility vehicles (SUVs) has meant that big cars have dramatically increased in popularity amongst US buyers.
Samira Hussain reports from the Detroit motor show.