Which car performed the best as far as CO2 emissions are concerned? Which has the worst?

What is the Carbon Footprint Score?
EPA Air Pollution Score?
Which car performed the best as far as CO2 emissions are concerned? Which
has the worst?
Was there a trend among cars that had high CO2 output?
What surprised you about the cars you chose?
In your opinion, what is the most important output from cars? Why?
If you had the money, what would be your next car purchase? Why? PLEASE
ANSWER THIS QUESTION HONESTLY! (Any BMW 2016-2019)
Will you change any habits as a result of this investigation? Why or why not