A big green bus rolled into Market Square, Sunday to make a point about clean energy.
Students from across the Southeast showed up in the W(e)VOW, the Waste Vegetable Oil Wagon.
The bus runs on vegetable oil and the students say it's a tangible way for the Southern Energy Network to talk about climate change and renewable energy.
The campaign is called Cleanin' up the "Dirty South."
The students say it's up to young people to make a difference.
"We have the most pollution, the most dirty rivers, the most dirty air, we have the most coal fired power plants and we want young people to come out and vote for clean energy solutions and also hold politics accountable."