"Green Joker" is a multilateral youth exchange, taking part in Czech Republic, where the hosting organisation is based, in the village of Kneznice and in Prague. It will gather together 30 young people from Czech Republic, Turkey, Poland, Lithuania, Netherlands and Portugal to explore the topics of sustainability- social and environmental justice issues through various art techniques and amateur art methods.The project aims to promote active global citizenship among young people, raise their sensitivity and participation towards the issues of sustainability, global poverty and marginalization, enabling them with skills such as creativity, critical thinking and entrepreneurship. Green Joker with its content: art- culture- global challenges, and its methodology-experiential, outdoor and environmental non-formal education- will inspire and empower young people to actively and creatively participate in civil society, equipping them with tools to channel their creativity and passion for diverse forms of arts- in order to address social and environmental concerns and voice their views and opinions. The participants will take part in 6 days of art, cultural, outdoor and environmental education exchange workshops during which they will have space for exchanging their competencies and preparing social and environmental awareness raising actions and happenings to be performed in the streets of Prague and during the international festival of street theater and new circus "Letni Letna" during the remaining 2 days of the activity. The methods applied are based on principles of non-formal education: amateur art, active participation, outdoor experiential education and experience exchange.