As global urgency around climate change and environmental responsibility continues to grow, sustainability events are taking center stage in 2025. These gatherings bring together business leaders, investors, policymakers, and researchers to exchange ideas, spotlight innovation, and collaborate on actionable solutions for our planet’s most pressing environmental challenges. From clean tech to circular economies, each event offers a unique lens on sustainability and a powerful opportunity to drive collective impact.
Excited to share our top ten sustainability events for 2025 below!
The Economist Sustainability Week
June 11-12 | New York & Virtual
With less than ten years to achieve the 2030 Sustainable Development Goals, there is a renewed urgency to examine global systems and balance human aspirations with the planet’s ability to sustain them. The event brings a high-quality business audience of CSOs, CPOs, CFOs, and CEOs together to drive action on environmental goals and energy security, specifically exploring how companies can use clean energy, smart technologies and strategic investments to promote economic growth and environmental responsibility.
Tickets: $1,099
TED Countdown Summit
June 16-18 | Nairobi
United in their commitment to building a brighter future, TED gathers global innovators, business executives, scientists, policymakers, next-generation leaders, artists and activists to inspire progress and pioneer a resilient path toward sustainable economic growth. TED has chosen to convene in Nairobi, a city on the vanguard of the continent’s energy transition, and in a country with 90% of its electricity from renewables and 50% of this from geothermal.
Tickets: $250
Bloomberg Sustainable Business Summit
June 26 | London
The Bloomberg Sustainable Business Summit brings together business leaders and investors globally to drive innovation and scale best practices in sustainable business and finance. This summit covers themes Quantifying Success, Owning the Mission, Scaling Innovation, and answers questions like, “How can companies in a diverse region grappling with a hotter planet, complex geopolitics and fierce global competition leverage ESG practices to redefine their business models?”
Tickets: Free
Aspen Ideas: Climate
July 21-22 | Chicago, IL
Aspen Ideas: Climate is a solutions-focused event designed for the public to interact with and learn from climate leaders, and will bring together a diverse group of voices—including policymakers from around the world, scientists, business and NGO leaders, energy specialists, artists, young changemakers, and engaged community members—for meaningful conversations designed to inform, inspire, and spark action in the fight against climate change and in adapting to our evolving planet.
Tickets: $250
Climate Week NYC
September 21-28 | New York City, NY
Climate Week NYC is one of the largest global gatherings focused on climate action, hosting over 500 in-person, hybrid, and virtual events across New York City. Each year, it brings together business leaders, policymakers, local changemakers, and voices from civil society around the world to accelerate progress, drive the transition to a sustainable future, and highlight solutions already making an impact. This year’s programming will explore how to stay competitive in a rapidly changing world, reduce costs while removing roadblocks, identify new opportunities, and scale investments in clean technology.
Tickets: Free
Techonomy Impact
September 24 | New York City, NY
This event will convene leading voices in technology, business, and environmental advocacy to explore the critical role of innovation in tackling climate change and advancing sustainable development. The conference emphasizes bold action, collaboration, and the need to overcome obstacles to create lasting progress.
Tickets: $499
Sustainable Brands SB'25 San Diego
October 13-16 | San Diego, CA
SB’25 San Diego brings together sustainability, brand, and innovation leaders to explore how businesses can integrate sustainability into core strategy. The event focuses on regenerative models, circular systems, and next-gen governance to drive both impact and growth. Attendees will hear real-world case studies, discover cutting-edge solutions, and collaborate across disciplines. With nearly two decades of experience, Sustainable Brands continues to foster a global community committed to shaping the future of responsible business.
Tickets: $2,795
World Sustainability Congress
October 15-16 | Amsterdam
The World Sustainability Congress is a two-day event in Amsterdam that brings together global leaders, experts, and innovators to explore the latest in sustainability and ESG. Through a mix of talks, panels, and case studies, the event highlights practical solutions, emerging strategies, and industry successes. With over 150 participants from around the world, the Congress offers a space for thoughtful discussion and cross-sector collaboration on some of today’s most pressing environmental and social challenges.
Tickets: TBD
World Conference on Climate Change & Sustainability
October 22-24 | Milan
The fourth edition of the World Conference on Climate Change & Sustainability, this event provides an opportunity to focus on how climate change affects everyone, from urban dwellers to farmers. This year’s theme is Addressing Global Climate Change for a Sustainable Future to accelerate collaboration and integrate climate action into global pandemic recovery.
Tickets: $599
Trellis Impact 2025
October 28- 30 | San Jose, CA
Bringing together three leading conferences in one location, Trellis Impact 25 is the center of gravity for doers and leaders focused on action and results: The event brings together the following: VERGE to mobilize professionals decarbonizing and future-proofing their organizations and supply chains through climate technologies; Bloom to convene leaders and innovators driving cutting-edge tools, business strategies, and partnerships to protect and regenerate nature; and GreenFin to equip professionals with strategies to harness the power of capital for the clean economy transition.
Tickets: $799
