A member of 1% for the Planet since 2020, Duncan donates 1% of annual sales to environmental non-profits every year.  He supports environmental partners such as Surfers Against Sewage, Solar Aid, Protect Our Winters, Spitalfields City Farm , The Thin Green Line Foundation and Dirt Foundation for the regeneration of the Earth.

In October 2024 he gained his certification in Business Sustainability Management from the University of Cambridge - upskilling to contribute in new and more impactful ways.  A member of Creatives for Climate he is playing an active part in the Purpose Disruptors discussions on reimagining advertising.