St Aloysius (Deemed to be University), despite its status as a minority institution, has imparted high quality education to all sections of society regardless of caste, colour or creed. Green campus is a concept to build sustainable living practices that are environmental-friendly in educational institutions around the world. In this regard, the University established "Centre for Environmental Concern" in 2021.

St Aloysius (Deemed to be University) is conscious and committed to the environmental issues with regard to protection, conservation and sustenance of natural resources. AL-VANA – an Arboretum – with an expanse of about 1.5 acres is maintained as a mini biodiversity spot on the campus with its natural flora and fauna. About 150 plants belonging to 70 different species are maintained in this Arboretum. Among these, 3 species belong to RET category. The floristic components with a good canopy and topography are favourable for the enrichment of the species.

On July 24, 2021, the Alumni Association of St Aloysius (Deemed to be University) organised 'Miyawaki - Urban Forest' campaign which was officially launched at St Aloysius (Deemed to be University) on July 24, 2021. The objective of this initiative is to use the Miyawaki method of plantation, a technique developed by Japanese botanist Akira Miyawaki that allows for the rapid growth of dense, natural forests. The approach is supposed to ensure that plant growth is 10 times faster and the resulting plantation is 30 times denser than usual. It involves planting dozens of native species in the same area, and becomes maintenance-free after the first three years.