Arsenal defender Hector Bellerin has joined forces with League Two club Forest Green Rovers making the Spaniard the second-largest shareholder.
"Forest Green are showing others the way," Bellerin told the club's official website.
"So many people feel there's no solution to the world's problems, but Forest Green are already doing plenty.
"I'm so excited to be part of the FGR family. I'll be helping where I can, supporting people who want to change the world for the better.
"Rovers went vegan in 2015 and were certified carbon neutral by the UN three years later.
"Forest Green Rovers prove to clubs who say they don't have resources to be sustainable that it is possible," he said.
"With the new stadium, being carbon neutral and vegan, the club is doing some mind-blowing work.
"People have a universal love of football, so there's no better industry to promote sustainability – and what we can do as football supporters to be more environmentally conscious."