A Super Bowl sponsor isn't playing fair with rubber workers in Liberia.

The Super Bowl is perhaps the last cultural event that unites a majority of Americans. Whether the game is a thriller or a snooze, Super Bowl Sunday is a day to gather with friends, rate the commercials, assess the halftime show and wear pants with elastic waistlines.

On Feb. 3, though, pay close attention to the halftime show. Tom Petty is performing, which means that any wardrobe malfunction could lead to the fall of Western civilization.

The show also stands to be a commercial bonanza for its sponsor, Bridgestone/Firestone. The Fortune 500 company has been crowned the "Official Tire Sponsor" of Super Bowl XLII and Super Bowl XLIII. As John Gamauf, an executive with the company, said, the sponsorship "is an unprecedented opportunity to showcase the Bridgestone brand to the world."

Peter Murray, the National Football League's senior vice president of partnership marketing and sales, chimed in: "By teaming with a global leader like Bridgestone, we can make America's favorite event even more powerful."

But NFL Commissioner Roger Goodell might want to be more careful about who the league cozies up to, especially when the partner is known in some parts of the globe not for high-velocity tires but for highly exploitative labor practices.

The rubber business has historically been horrific for African workers, known as tappers, who collect sap from rubber trees on plantations south of the Sahara. The labor practices of the Firestone Natural Rubber Co., a subsidiary of Bridgestone/Firestone, in Liberia seem in keeping with this history.

For 81 years, the company has operated a plantation in Harbel, a company town in the truest sense. Its very name comes from founder Harvey Firestone and his wife, Idabelle. The town received its name after Firestone signed a 99-year lease with the Liberian government in 1926 that gave his company access to 1 million acres of land on which rubber trees grow. The sap -- known as latex -- collected on the plantation is shipped to the Bridgestone/Firestone plant in Nashville, where it is used to make tires, among other goods

According to a 2005 lawsuit filed by the International Labor Rights Fund, a Washington-based advocacy organization, Bridgestone/Firestone allegedly overworks, underpays and exposes its 4,000 Liberian employees to hazardous chemicals and pesticides. Its subsidiary also oversees what has been called de facto slavery.

Dan Adomitis, president of Firestone Natural Rubber Co., said that "each tapper will [draw sap from] about 650 trees a day, where they spend perhaps a couple of minutes at each tree."

That translates into a 21-hour day. If employees don't make that quota, their daily wage of $3.19 is cut in half. To avoid this, workers call on their wives and children to help them hit the number -- and they go unpaid.

In addition to the lawsuit, which is pending in Indiana, Bridgestone/Firestone has drawn fire from other quarters. The Liberian Environmental Protection Agency has cited the company's subsidiary for dumping toxic waste in Harbel's Farmington River, and in early 2007, the corporate parent won the "Public Eye Global Award" for irresponsible corporate behavior because of its record on child labor and the environment. The "award" ceremony is held concurrently with the World Economic Forum in Davos, Switzerland.

Bridgestone/Firestone says that the plantation jobs pay well by Liberian standardsand that they come with an array of essential social services.

Liberian workers may disagree, but in a country with 80% unemployment, they can't just walk off the plantation and find another job. "In our country, you are young, then you get married, then you have children and then you die," Junior Tokpah, a tapper, was quoted as saying in a McClatchy News Service story published at the end of 2006. "There are no other prospects. That's why I can't complain about this work too much."

In July, the Firestone workers on the plantation took a different tack to protest their working conditions: They held an election and voted out the leaders of the longtime company-controlled union.

But the ousted company-appointed officials challenged the results in court, and Firestone refused to bargain with the new elected union leadership. In December, workers walked off their jobs, demanding that the company recognize their union.

Then later that month, the Liberian Supreme Court ruled that the July elections were legitimate and that Firestone would have to negotiate with the union. Austin Nantee, the newly elected president of the Firestone Agriculture Workers' Union of Liberia, said workers "are looking forward to carving out a new collective bargaining agreement with the company."

But Firestone has not definitively accepted the election outcome and still has not negotiated in good faith with the newly elected union leadership.

So the question remains: Should the NFL be offering an international platform to a company accused of using child labor and refusing to bargain with a union whose leadership was democratically elected?

Goodell has been quick to levy tough suspensions and stiff fines on players who run up against the law off the playing field. He should be as vigilant in picking sponsors for his league's marquee game.

Dave Zirin is the author of "Welcome to the Terrordome: The Pain, Politics and Promise of Sports."

Resolution adopted by Berkeley Peace & Justice Commission, which will be voted on by Berkeley City Council on January 29, 2008: