Interesting stuff

It's more important to work at the bottom than the top
But do the politicians know it?

18 Is Enough — Sightline Institute:

"You save more fuel switching from a 15 to 18 mpg car than switching from a 50 to 100 mpg car."

Math works, and even better for this:
GMC - 2008 Yukon Hybrid | World's First Hybrid SUV

From 14 city to 21, a 50% improvement
Plenty of arguments on both sides, a Yukon is bigger than we need in our household, but if you carry a lot of bodies, or just stuff, it may make sense.
Greatest savings being city

And remember, hauling 4 folks in a SUV (plus gear) is about the same as 2 in a Prius. Maybe even better once EPA data is adjusted (down)