When it gets cold it turns to goo... and they get a day off. Turns out the stuff wasn't realy made for our kind of winter. Who'd a thought?

All schools in the Bloomington School District will be closed today after state-required biodiesel fuel clogged in school buses Thursday morning and left dozens of students stranded in frigid weather, the district said late Thursday.

Rick Kaufman, the district's spokesman, said elements in the biodiesel fuel that turn into a gel-like substance at temperatures below 10 degrees clogged about a dozen district buses Thursday morning. Some buses weren't able to operate at all and others experienced problems while picking up students, he said.