It is an environmental sin to own a "gas guzzling" truck or SUV, regardless of whether that truck is used [...]
I understand the point you are trying to make (energy consumption is an aggregate quantity so cannot be derived from instantaneous measurement), but of course it is annoying people like her which have caused the kind of changes that have resulted in a 50mpg family car as opposed to a 22 mpg car, and there's no reason to suppose that 10 years from now that guy won't be able to haul a dead deer in an SUV-sized vehicle that does 50mpg.
Sadly, it is often the over-bearing extremists that cause progress to be made.
> there's no reason to suppose that 10 years from now that guy won't be able to haul a dead deer in an SUV-sized vehicle that does 50mpg.
Increasing the fuel efficiency of vehicles is not something that can be achieved by will alone; it also requires the cooperation of physics.
First, the SUV could quite likely already do 50mpg if driven by a hypermiler, and maybe fitted with truck tires and a streamlining tail. But it would take twice as long to get back from the deer hunt, and it would be a bumpier and much less comfortable ride.
At a given speed with a given frontal area in a given density of air, though, you're really limited by how low you can get the drag coefficient, and at any speed you're limited by how low you can get the mass and rolling resistance.
it is annoying people like her which have caused the kind of changes that have resulted in a 50mpg family car as opposed to a 22 mpg car
That's partly true. But it's also true that it's people like her that are the reason for behemoth SUVs.
Back in the 70's such folk agitated for the CAFE regulations governing fleet fuel efficiency. It's important to note that these standards applied to passenger cars, as they quite clearly cannot be applied to 18-wheelers.
We got cars of greater efficiency, and one of the changes that led to this was the demise of large family station wagons. However, the consumers still wanted a way to drag around their families. This led to the evolution of the minivan, and eventually to the SUV.
While I don't have nearly enough data to know whether the net effect was positive, it's clear that at least at the margin, the effect of the CAFE regulations was negative.
You can't fool the market. It always finds a way to route around obstacles.
But it's also true that it's people like her that are the reason for behemoth SUVs.
You have some interesting speculation here but no evidence at all.
Growing up my family had a station wagon and a regular sedan. They had comparable gas mileage IIRC. I think station wagons were driven out of the market (heh) in part because people felt safer and more powerful in SUVs and when you're driving your family around, safety matters. I certainly knew a lot of people who got SUVs for hauling the family around specifically because the high altitude made them feel invincible and they assumed that the extra weight would help in crashes against smaller vehicles.
For whatever it's worth, I have an anecdote regarding safety in station wagons vs. SUVs. When I was young my little sister was almost killed in a car accident because she was in the back seat of a station wagon when they were rear-ended by an SUV. SUVs don't have the same bumper level that other cars do, so instead of impacting the designed crumple zone, the SUV rolled up into the back window of the station wagon. Another foot and she would have been decapitated.
Subsequently, I've seen a couple sources which corroborate this trend -- in high speed accidents between cars and SUVs the fatality rates where higher than two cars.
I understand the point you are trying to make (energy consumption is an aggregate quantity so cannot be derived from instantaneous measurement), but of course it is annoying people like her which have caused the kind of changes that have resulted in a 50mpg family car as opposed to a 22 mpg car, and there's no reason to suppose that 10 years from now that guy won't be able to haul a dead deer in an SUV-sized vehicle that does 50mpg.
Sadly, it is often the over-bearing extremists that cause progress to be made.