Mark Mellett is former chief of staff of the Irish Defence forces. Mellett has a unique perspective on climate and environment, having worked as with the Irish Naval Services and the Irish Defence Forces for many years. His experience has led him to believe that climate change poses one of the biggest security risks facing the world today, from migration, to conflict, to protecting new energy infrastructure.

For his policy changes, Mellett proposed for Ireland to bolster European Union security and autonomy by becoming a clean energy hub, address climate security and migration at an international level, and promote loss and damage funding for poorer countries.

For his personal change Mark discussed buying an electric car, and how he had set up a new company to help contribute to global climate action