Editor’s Note: NBA Green is teaming up with the Arbor Day Foundation to plant three trees for every three-pointer made during games on Arbor Day (4/25). Trees will be planted in California to support wildfire recovery efforts and urban neighborhoods lacking green space, with the first 32 planted in Los Angeles in Bill Walton’s honor. Long before sustainability became a mainstream movement, NBA legend Bill Walton was quietly living the principles that would later define environmental consciousness.