EarthX was founded in 2010 as Earth Day Dallas by Trammell S. Crow in an effort to increase environmental awareness in the local community. As the event grew and evolved, its influence and focus expanded and it was renamed Earth Day Texas and finally EarthX when the interests and initiatives of the organization expanded worldwide.

From 2010 to 2023, EarthX convened EarthX EXPO, the world’s largest green gathering in the days surrounding Earth Day in April at Fair Park in Dallas, Texas. The event eventually grew to welcome over 177,000 visitors hosted by nearly 400 exhibitors and sponsors from organizations and businesses who operate, educate and trade in the environmental space.

While the Expo appealed to the general public, the EarthX Congress of Conferences was developed to bring together governments, business leaders and a diverse array of attendees to cut across industry and political silos to bridge perspectives, leverage expertise, and foster multi-partisan collaboration that drives progress toward environmental solutions.