, a publisher and developer of casual video games, is teaming up with National geographic to develop a “green” title.

The partners announced Wednesday, which was Earth Day, the launch of a building “sim” (simulation) game that incorporates environmentally friendly technology.

Players take on the role as “Mayor of Greenville” and are tasked with building a green city.

The game’s introduction says:

“You’ve been elected the Mayor of your hometown and have decided to take the barren environment and Plan It Green! Bring back the natural beauty of your city, and create a brighter, cleaner future. Build eco-homes and apply green upgrades, all while bringing new clean jobs and industry to your city. Increase your Greendex as you leave behind the ways of the past and create a beautiful, sustainable metropolis!”

Merscom and National Geographic say “Plan It Green” is the first casual green game.

“This is the right product for the times. Not only is it a fantastic game, but it integrates a theme we all hear hundreds of times a week,” said Merscom Chief Executive Officer Kirk owen.

“By working with National Geographic, we were able to go beyond pop green ideas and make a game that truly conveys the possibilities of the future,” he added.