Why a bunch of celebrities are wearing green ribbons at the Emmy Awards

Wardrobe choices are always a hot topic at the annual Emmy Awards, but tonight's show wasn't just about celebrities dresses and suits - many stars also chose to accessories their Emmy looks with green ribbons reading #DemandClimateAction.

Here's Jeffrey Tambor accepting his award for best actor in a comedy for his role as Maura Pfefferman in Amazon's "Transparent." Notice the green ribbon on his chest. 

Here's a close-up look at Tambor's ribbon, which makes it a little easier to read the hashtag. 

Tambor was joined by his "Transparent" co-star, Gabby Hoffman, who was also sporting a ribbon. 

Don Cheadle, nominated for his role in "House of Lies," was also wearing one. 

Online, people were initially unsure of what the ribbons were about. Some people thought they might be in honor of mental health awareness, which many actors wore last year in honor of Robin Williams.

However, after Tambor accepted his award, people online quickly realized what the ribbons were honoring. 

Many of the responses were fairly positive.

 Learn more about the #DemandClimateAction campaign here.