They're battling it out...for the good of the planet.
The annual University of Florida Eco-Challenge puts campus residence halls to the test. The focus is on water and energy conservation in the dorms and recycling all over campus.
It may be a competition between the halls, but they want to challenge the entire community to be green.
Inter-Residence Hall Association Director of Environmental Concerns Britany Ziems said, "It's happening on a small basis at the University of Florida, but eventually when people move on to different cities, to different countries they'll impact everybody else there and everybody else around them and eventually it will change the world."
Turning off lights, unplugging electronics when not in use and taking shorter cooler showers are some of the ways you can conserve.
The residence hall with the most reductions will be recognized on Earth Day, April 1st.