According to the facebook page: 

"Students for Environmental Concerns' two groups, Political Action and Sustainable business, are collaborating to reduce single-use plastic bags at the University of Illinois at Urbana-Champaign and local businesses.
We hope to raise as much awareness as possible.
Plastic bags have countless detrimental effects to our environment. Just to name a few, plastic bags are non-degradable, account for major part of our landfills, and cause harm to marine life. In the month of January 2016 alone, UIUC bookstore used 36,000 single-use plastic bags.
Our proposed solution is to Skip the Bag at the counter, and just use a reusable bag or backpack.
Already plastic bags have dominated the norm behavior of Americans, so that is why it is so important we take action today. Your individual contribution and support would make a huge difference in our campaign!"