The project, also backed by Appian Way Productions, will have its world premiere at the Toronto international film festival on September 11, according to The Hollywood Reporter.
Anjali Nayar and Hawa Essuman direct the profile of Silas Siakor, who crusades against illegal logging in Liberia.
DiCaprio has been a strong advocate of fighting climate change and preserving wildlife, and his documentary, "Before the Flood", was also screened at the TIFF last year.