November 29, 2006. Supreme Court oral arguments in Massachusetts v. EPA. Twelve states were suing the Environmental Protection Agency for refusing to regulate greenhouse gas emissions from vehicles. The Bush administration's defense was elegant: states had no standing to bring the suit at all. Win that argument, and no one could ever force federal action on climate through the courts.

James Milkey, Massachusetts Assistant Attorney General, was making his case when Justice Anthony Kennedy interrupted: "What's your best case?"

Milkey answered. Then Kennedy said: "Well, I think your best case is Georgia v. Tennessee Copper."

Kennedy had done his own research. He'd found a 99-year-old precedent about sulfur dioxide from Tennessee copper smelters killing Georgia forests. A case about dead orchards that would unlock federal courts for climate litigation.

When the Farmers Couldn't Stop It

Between 1901 and 1903, W.M. Madison and other farmers near Ducktown, Tennessee filed three separate lawsuits against the copper companies whose smelter smoke was destroying their land. Their collective property was worth less than $1,000. The companies' holdings were worth nearly $2 million, provided half of Polk County's taxable income, and employed more than 10,000 people.

The farmers alleged the smoke "descended upon the surrounding lands, and injures trees and crops, and renders the homes of complainants less comfortable and their lands less profitable." The Tennessee Supreme Court ruled in 1904 that while the companies were liable for nuisance, shutting them down would cause greater economic harm than allowing them to continue. The farmers could collect damages. They couldn't stop the pollution.

Hundreds more farmers sued. Some won money. None changed the smelters' practices. The smoke kept drifting south into Georgia, where sulfur dioxide was killing forests and orchards across five counties.

Georgia residents asked their state government to act. The legislature studied the pollution, found it was causing damage, and the Governor wrote to Tennessee demanding intervention. Tennessee refused. So in 1907, Georgia sued the copper companies directly in the U.S. Supreme Court, claiming authority to protect its territory even when the source state wouldn't act.

Justice Oliver Wendell Holmes' decision established that states have standing to sue for environmental harms affecting their territory—not because individual citizens were damaged, but because states themselves have:

Georgia won. The Court went further, appointing a Vanderbilt chemistry professor to conduct mandatory inspections of the smelters twice monthly, monitoring operations and measuring sulfur emissions. The 1916 decree set specific limits: no more than 25 tons of sulfur per day during growing season, 50 tons at other times. The companies spent $600,000 building acid plants to capture emissions.

Georgia v. Tennessee Copper created a mechanism—a pathway for states to protect their environments from interstate pollution when the source state wouldn't act.

That mechanism sat dormant for decades.

The Devastation That Remained

The Copper Basin where those smelters operated became one of three human-made marks visible from space—alongside the Great Wall of China and the pyramids of Egypt. Fifty square miles where no plant lived. Annual soil erosion of 200 tons per acre washing into rivers. Twenty-three thousand acres of forest reduced to red dirt and rock.

Mining ended in 1987. The Tennessee Valley Authority spent 70 years planting 16 million trees, returning 11,025 acres to productive use, reducing erosion to eight tons per acre. Native fish returned to recovering streams. Songbirds came back on their own.

About 100 acres near the historic Burra Burra mine remain intentionally barren—to show what happens when we don't protect the land.

Air pollution became a federal matter under the Clean Air Act. Interstate environmental disputes got resolved through EPA regulations. The precedent existed, but for decades no one needed it.

Until forty-two briefs were filed in Massachusetts v. EPA, and none of them mentioned it.

Kennedy's Research

Environmental organizations, industry groups, states on both sides, legal scholars—everyone building arguments about whether EPA had to regulate greenhouse gases, whether states could sue about it, what the Clean Air Act required.

No one cited the case about sulfur dioxide crossing the Georgia-Tennessee border.

Kennedy's citation signaled the environmental side had won on standing. Lazarus understood immediately: "They likely had five votes at least for the right to bring the lawsuit. If they had lost on that issue, it would have meant that no one could ever bring lawsuits based on climate-change injury in any federal court in the U.S."

Justice John Paul Stevens' majority opinion in the 2007 decision quoted Holmes directly: "This is a suit by a State for an injury to it in its capacity of quasi-sovereign. In that capacity the State has an interest independent of and behind the titles of its citizens, in all the earth and air within its domain."

Chief Justice John Roberts dissented, arguing the 1907 case "had nothing to do with Article III standing." But the majority's interpretation held. The decision established two things: EPA's authority to regulate greenhouse gases, and states' lower barriers for proving standing in environmental litigation than individual plaintiffs face.

Every major climate case since has used that framework. When states sue about sea level rise, extreme heat, wildfire smoke crossing borders—they're using the authority established when Georgia sued Tennessee in 1907.

The Tools We Don't Recognize

Kennedy recognized in 2006 that a case about dead orchards had created the framework for addressing rising seas. The precedent existed for a century before anyone realized it was the key.

Holmes answered in 1907 the same question courts face now: when environmental harm crosses state lines and the source won't act, who has standing to protect affected territory? The authority was created when Tennessee farmers couldn't stop the smelters and Georgia had to sue across borders.

It took Kennedy's independent research during oral arguments to show everyone that the authority they needed had been sitting there all along. The precedent was a Supreme Court decision. People just hadn't recognized what it meant for climate litigation until the moment they needed it most.

The gap between creating legal authority and recognizing what it enables can span a century. Will we find the tools we need in time, or will they sit dormant while we argue about whether we have the authority to act?