as the use of public transportation increases , the use of automobiles decreases
car is vehicle_for_personal_transportation. most_cars is energy_inefficient_form_of_transportation. automobile_industry is transportation_industry. transportation is movement. driving is transportation_of_people. drive is transportation. automobiles is another_form_of_transportation. car is used_fro_transportation. commercial_transportation is driving. automobiles_move_because has engines