Participants are divided into 12 groups and sent to different areas, each accompanied by a guide familiar with the city.
Thousands of volunteers take part in a clean-up in Leiria
Saturday, 31 January 2026RSS

Context & Explainers
Sustainability (sustentabilidade) means meeting present needs without reducing the ability of future generations to meet theirs, covering environmental, economic and social dimensions. For residents it affects local planning, jobs and services—look for municipal or company targets, timelines and measurable actions when assessing how sustainable a place or employer is.










