ZERO is a Portuguese environmental non-governmental organisation, established as a non-profit association with public-interest status and a national remit. It was created in late 2015 by around a hundred people with a shared interest in advancing sustainable development in Portugal. 2
The organisation focuses on influencing public policy, aiming to make sustainability a guiding principle in society. It engages with political decision-makers and businesses, works with other organisations, and uses public communication and awareness-raising to support its aims. 212 Its policy work also addresses European and global issues, alongside national policy. 1112
ZERO’s work is organised around five thematic areas: water and oceans; climate change, energy and mobility; biodiversity, agriculture and forests; sustainable societies and new forms of economy; and land and spatial planning. It also develops projects demonstrating sustainability practices. 1112 The organisation describes its work as independent of political parties, government, businesses and religious entities. 2
The registered contact address is on Avenida António Serpa in Lisbon, Portugal. 2 Francisco Ferreira is the organisation’s president, re-elected for the 2025–2028 term; Susana Fonseca is vice-president. 49 ZERO reported 2,763 members at the end of 2025. 8