The green line- When a Wazer checks optional routes (and also in the preferences/initial destination route) the most energy efficient route shall be marked as the "Green Line".The Wazer should provide Waze with its car model, design, and year so Waze could calculate the energy consumption.There is a difference between the routes because of distance, time, type of ride etc.At the end of the ride the Wazer will be provided with estimated carbon footprint.From Waze perspective - much more data... and from there you can think about many products and ways to monetize it