Do you know of a hero for the “global good”? Someone who inspires with their work to reduce poverty and improve health around the world? Someone who has ushered in significant change in their community through commitment and creativity?

Then nominate this hero to take the stage alongside Melinda Gates at TEDxChange, happening this coming April 5th in Berlin, Germany.

TEDxChange is exploring “The Big Picture” — how fresh ideas and new perspectives can help to solve some of the world’s most pressing health and poverty issues. The event is seeking to find and elevate those new and undiscovered voices who have a lot to say.

Nominate your hero of “global good” to speak at TEDxChange.

Melinda Gates will announce the final speaker line-up at the beginning of February.

The program will be streamed live on TED.com but you can also organize a TEDx event around the TEDxChange webcast. 96 events have signed up so far!

To learn more about the event and how you can take part, visit the TEDxChange Facebook page, and follow TEDxChange on Twitter.