In Fried Greenhouse Tomatoes, the Zula Patrol learns all about the greenhouse effect first-hand when a seemingly helpful robot shows up at Zula Patrol Headquarters and starts making duplicates of itself. It turns out that the robot, sent by Dark Truder, emits powerful amounts of greenhouse gases that can increase the greenhouse effect and someday make Zula uninhabitable. The Zula Patrol must race to stop the robots before they destroy Zula’s atmosphere.