In 2015, Akinsemolu founded Green Campus Initiative (GCI), the first campus-based environmental advocacy organization in Nigeria. Its organizational model was recognized at the Fourth Annual Green Campuses Conference 2015 at the University of the Western Cape in South Africa with awards for green campus activities. GCI is a member of the UN Sustainable Development Network, has over 500 ambassadors, and has trained more than 5,500 students across 28 country's universities. In 2017, the Green Campus Initiative developed into the Green Institute, the sustainability research and training institution, and a social enterprise. Professor Damilola S. Olawuyi became the first president of the institute. The institute provides academic programs on Sustainability and activities on building social entrepreneurship, in line with meeting the United Nations Sustainable Development Goals. The organization is the first academic institution in Nigeria to finance college tuition costs through a waste management program “Trash for education” providing students with "credits" in return for the collected waste, which is later purchased by the state government and private enterprises.