The following comic has a point, but like most economic and energy issues squeezed into a four-panal drawing, it tends to simplify the issue:
Gas prices are a getting higher, there is turmoil in the Middle East, food prices have increased and we do use corn for biofuel. You can't argue that the father is lying, but he is leaving out several other facts that would help his child have a better grasp of the situation. It might has well have read like this:
Child: "Why are gas prices so high?"
Father: "Oil companies cashing in on turmoil in the Middle East" or "High sugar tariffs" or "Hubbert's peak fears" or "I don't know what you're talking about, compared to Europe we're getting a deal."
Child: "What started the turmoil in the Middle East?"
Father: "Global unemployment and corruption" or "Lack of reliable infrastructure" or "People with satellite phones"
Child: "Why are food prices so high?"
Father: "Because we use our corn for every kind of food imaginable" or "Transportation issues of getting food to hungry people" or, hell why not? "Global warming"
I don't know why this one bothered me so much. Maybe it's because the kid has a funny haircut.