The columnist then suggests that replacing an older truck may not be the "most environmentally sensitive way to go", since another new vehicle hits the road while an old one clogs up a junkyard. Then goes on to say that repairing an old vehicle is usually cheaper than buying a new one.
Officials in California have long wished that old vehicles would get off the road. Governments even sponsor crusher programs and allow pollution credits to be traded or sold for every old car that is sent to the jaws. I don't know the specifics but the majority of smog in the Los Angeles basin is caused by a minority of vehicles that are much older than the current clean-running models. Basically, if everyone was rich in Los Angeles and could buy a new car, hybrid or not, the air quality would improve dramatically.
When it comes to trucks, environmental writers need to research the subject a lot more before giving advice.
[Source: Southwest News Herald]