Accolades
In his lifetime, Mendes was awarded several recognitions for his accomplishments in pushing forth environmental efforts and fighting for social justice.
| Year | Awards and Recognition | Awarded by |
| 1987 | Global 500 Award | United Nations |
| 1987 | Protection of the Environment Medal | United Nations |
| 1988 | Environment Medal | Better World Society |
| 1988 | National Conservation Achievement Award | National Wildlife Federation |
| 2013 | Patron of the Brazilian Environment | Brazilian Government |