Mrs. Frizzle and the Magic School Bus webquest

1. The Magic School Bus Gets Cleaned Up
2. Air Pollution is something to get choked up about!
3. A Sick Bus Coughs Out Exhaust
4. A Different Fuel? by Phoebe
5. Mrs. Frizzle's Class Gets Dirty
6. Clean As A Whistle by Phoebe
7. Get Money for Your School

Clean As A Whistle by Phoebe

Another way to clean up Mrs. Frizzle’s bus is to use a diesel particulate matter filter that removes pollutants. Buses built before 1995 can’t use these filters, but they can be installed on newer buses. How much does one cost?