The Magic School Bus and the Climate Challenge is the twelveth book in the original book series.
Ms. Frizzle's students are putting on a play about global warming, and they need some cold, hard facts. She knows just where to find them! A hop on the bus takes the kids on a whirlwind tour. From the Arctic to the equator, they see telltale signs of climate challenge. But to get the really big picture, they have to get really small--so they can see exactly what's in the air and why it is making the world warmer. What they find gives them a real cause concern!