Apparently you didn't get the memo that a BMW V8 was more fuel efficient that a prius? Look up the Top gear episode about it.
Or the fact that a H2 Hummer is more environmentally friendly than a prius in the life cycle of the vehicle.
And the whole global warming thing. Seems they got it backwards. The CO2 is not causing the warming, the warming is causing the ocean to release more CO2 than normal.
And since we've only been keeping temp records for the last 150 years, how do they know this is not just another NORMAL cycle in the billion year life span of the earth?
But I enjoy every bit of the 429 HP in my R Spec every chance I get. Wish I had more as I used to drive a 600 HP blown SBC as my daily driver.

And my built 103HP Harley still got 50 MPG, same as the stock 50 HP original motor did.