Like many things, the problem comes down to money. These ice cream trucks are small businesses that have to hustle to earn a living, spending their days roaming the city during the peak season to make a buck. I couldn't find exact figures, but my guess is these guys don't rake in big money. The margin on ice cream at $3 a pop can't be huge. They can't afford to invest in green business practices unless their customers were willing to share the burden of the expenses. One practical mom pointed out that it might be great to say one supports green business, but in the current economy, how many people are willing to see prices go up to actually do it? As it is, I limit my kids to ice cream once a week as a special treat; I can't imagine what it would be like to buy two ice cream cones from a truck and spend more than $10.
To be honest though, my biggest complain is the noise. These trucks cruise the neighborhoods trolling for potential customers blasting their familiar jingle. My local truck has amazing timing! It always manages to arrive outside our door at precisely the moment my three year old closes his eyes for the night. Immediately upon hearing the familiar tune, my son's eyes fly open and pleas for ice cream echo from the baby monitor. I swear that song is one of my least favorite things about summer!