On November 3, between 2 pm and 6 pm, the hybrid webinar “Biosphere Reserves as Sustainability Laboratories: Working for a better world” took place. This event, co-organized between the National Commission of Unesco – Portugal and the Superior School of Tourism and Sea Technology – Polytechnic of Leiria, is part of the celebrations of the 50th anniversary of UNESCO's “Man and Biosphere” scientific program (Man & Biosphere) – MAB and also in the celebrations of the Month of the Sea, organized by ESTM and had the support of the National Committee for the MAB Program and the 12 Portuguese biosphere reserves. The MAB Program oversees the World Network of Biosphere Reserves, which already has 727 biosphere reserves in 131 countries, including 22 transboundary biosphere reserves.