Green Man Festival refuses commercial sponsorship and therefore can focus on local Welsh food and drink providers, rather than being tied into corporate deals. The festival has a strong environmental focus, using solar power as much as possible. The food and drink services are required to meet standards such as being Fairtrade, Red Tractor and Marine Conservation Society accredited. In 2019, Help Refugees (now known as Choose Love) and Newport to Calais Aid Collective collected donated tents to be recycled and reused. The festival has never used single-use plastics and encourages caterers to use Welsh produce.