5th place: Toyota Prius Prime (49 g of CO2/km driven)
Toyota Prius Prime | Photo: D.Boshouwers
Here's a regular presence on the low-emissions vehicles charts, and it has been so for seemingly forever. Quite frankly, the Toyota Prius Prime really doesn't need any introduction anymore. You might not like its quirky looks, but its eco-friendly bonafides are simply beyond question.
See also: 2021 Toyota Prius Prime Review: What's New with Everyone’s Favourite Ugly Duckling?
Toyota Prius Prime, three-quarters rear | Photo: D.Boshouwers
Toyota Prius Prime, hybrid badging | Photo: D.Boshouwers