On Friday, the school is having more than 40 vendors of sustainable products, art, food, student groups, and more.
The event is being put on by Muhlenberg's student Environmental Action Team.
Amanda Meier, President of EnAcT, said, "If we don't care about it, humans can't really sustain themselves on this earth for that long. And it's great if we could have a balance with the environment."
She said that by having all the groups set up on Friday, it gives some grassroots ideas and groups a chance to be seen and heard.
The school also boasts that every day at Muhlenberg is Earth Day because of the many sustainable initiatives, such as the Urban EcoFish project and solar hot water systems.
The Earth Day event at Muhlenberg is from 11 a.m. to 10 p.m. Friday. It's free and open to the public.