compare 2 different brands of car to see which one is less population and good for our environment

compare 2004 Ford Mustang and 2014 Toyota Prius

-how much pollution do they cause?

-ho much pollution cause to build a brand new prius?

-how it effects to our environment?

-driving cars produce more CO2, how this relate to climate change?

-pollution cost by the car in Santa Clara County

these are pretty much requirement for my paper