Final answer:
Vehicles built since 1994 feature automatic transmission technologies such as 7+ speeds, DCTs, and CVTs, which enhance fuel efficiency and lower CO2 emissions.
Step-by-step explanation:
All vehicles built since 1994 have automatic transmission technologies. These advancements, such as 7+ speeds, dual clutch transmissions (DCTs), and continuously variable transmissions (CVTs), have been pivotal in improving fuel economy and reducing CO2 emissions associated with vehicles. By allowing the vehicle to operate more efficiently at different speeds, these technologies have both environmental and economic benefits.