The Big Church Festival in the UK, held at the Wiston Estate, made history by powering its main stage with green hydrogen for the first time. By embracing this sustainable energy source, the event hosted over 30,000 attendees from the UK and beyond in an environmentally friendly manner. The shift from diesel generators to green hydrogen marked a proactive step towards mitigating climate change, cutting air pollution, reducing noise, and safeguarding the well-being of both event workers and local communities. The event's power supplier, Pearce Hire, collaborated with GeoPura to provide sustainable electricity throughout the festival, resulting in a significant reduction in CO2 emissions compared to previous editions. This initiative was praised by event organizers and industry professionals for showcasing a commitment to sustainability and environmental stewardship. The versatile design of GeoPura's hydrogen-powered generators not only ensured reliable power for the event but also supported onsite facilities with zero-emissions power. The festival's proactive measures to reduce power consumption, increase recycling efforts, minimize single-use plastics, and manage food waste align with its goal of achieving carbon neutrality. The European Green Festival Roadmap emphasizes the urgency of transitioning away from fossil fuel sources in the events industry, highlighting the unsustainable nature of diesel generators. By adopting green hydrogen technology, the Big Church Festival set a positive example for the industry and contributed to a more sustainable future for events worldwide.