For the 70s and 80s RC, **2 Star Difficulty rating**: 70, 72, 76, 77, 80, and 83; **3 Star Difficulty**: 71, 73, 74, 75, 78, 81, and 82; **4 Star Difficulty**: 79. Hope that helps!
Henry says that electric engines (cars ... brings up another consideration that Henry overlooked. He reminds us ... their pollution even matter? Henry was only concerned about ... in the first place. Henry actually needs switching to ...