It ain't easy being green ... but rapper/actor Ludacris has signed on to star in the Discovery Network's upcoming reality series to show the country how important it is to take care of the environment.

Ludacris will star alongside former Motley Crue drummer Tommy Lee in the reality program dubbed 'Battleground Earth,' which is set to air in late July or early August, according to Variety.

In the meantime, the rapper is working on several projects, including a film titled 'Max Payne' with actor Mark Wahlberg, Mila Kunis and Beau Bridges. Luda will also flex his acting muscles in the upcoming basketball drama 'Ball Don't Lie,' starring Nick Cannon and Rosanna Arquette.