Gas prices have taco cart owner, Raul Rodriguez, hitting the breaks. Like other food trucks, he not only has to deal with the cost of fuel, but also the expense of commodities. In fact, it’s the rising price of ingredients like meat, produce, and condiments that has hurt him the most. While Rodriguez has been charging more for tacos to make ends meet, two other New York vendors see high gas prices as a harbinger for creativity. One has been using old cooking oil as fuel and the other has been filling up with a less common form of energy – natural gas. By tagging onto the “green” movement, they’ve adapted to the sluggish market and kept on trucking.