The Super Bowl, essentially an American holiday, is an excuse to scream at a TV and eat and drink more than the average human should. More than 100 million Americans are expected to tune in Sunday to watch the Seattle Seahawks take on the Denver Broncos. But like all large sporting events, the Super Bowl, and all the fanfare that goes along with it, carries a rather hefty environmental impact. To its credit, the National Football league has stepped up its efforts to host a greener event, making this year's event the greenest Super Bowl ever. But there are plenty of ways for those of us not privileged enough to watch the game in person to do our part as we watch at home. Here are a few ways to make sure your Super Bowl party is as green as possible.