**2. Description of non-edible plant sources**

Four novel and non-edible plant sources have been explored for bio-diesel production comprising *Koelreuteria paniculata* [39]*, Rhus typhina* [40]*, Acacia farnesiana* [41]*,* and *Albizzia julibrissin* [42]*.* The plant seeds were collected from China (Urumqi, Binhai new area near Nankai University's new campus Tianjin) and Pakistan (Lakki Marwat and Islamabad).
