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Michigan Researchers Put Price Tag on Climate Liability for Fossil-Fuel Plants

Coal-fired power plants across the country could be billion-dollar liabilities for utilities if their greenhouse gas emissions are challenged in court, according to researchers at Michigan Technological University.

Should an entity — individuals, groups or governments — take legal action against utilities for their plants’ greenhouse gas emissions and contributions to climate change, researchers have developed a way to determine the amount of monetary damages that might be awarded to plaintiffs.

These polluting plants, therefore, could have significant impact on shareholders, researchers say.

While oil companies are under scrutiny over whether they adequately disclosed climate risks in securities filings, utilities face similar risks by not curbing greenhouse gas emissions from their conventional plants, according to a recent paper published in Renewable and Sustainable Energy Reviews.

The research — co-authored by Michigan Tech electrical engineering and materials science professor Joshua Pearce and research assistant Negin Heidari — sought to quantify potential liabilities for the top greenhouse gas emitters in the country. 

The 10 highest-emitting power plants include four in the Midwest.

And while some legal experts say getting monetary damages from utilities over their greenhouse gas emissions is unlikely due to legal precedent, Pearce believes greater public awareness and a wider body of research means the legal arguments are less settled.

“For conventional power plants the potential liability due to greenhouse gas emissions was not well defined — so we did this study to attempt to begin quantifying the values,” Pearce told Midwest Energy News. “One of the questions I was really curious about is: Even if all climate change related damages were assigned to emitters would it even matter financially to the companies?

“As it turns out – the potential liabilities are substantial and should not be ignored by investors,” he added.

And should litigation become more common, Pearce said those most at risk are “producers of coal, oil, natural gas; power companies; and cement manufacturers. Many such companies operate in the Midwest.”

Potential liability varies widely

Among the top 10 emitters in the U.S., two are in Indiana (Rockport Generating Station owned by American Electric Power and Gibson Power Station owned by Duke Energy), one in Ohio (Gavin Power Plant owned by AEP) and one in Michigan (Monroe Power Plant, owned by DTE Energy).

The researchers used seven methods found in the scientific literature to assign emissions liability, based on $80 per ton of emissions. Pearce said the potential liability among energy companies “varied widely” depending on which method was used.

Under models that assign responsibility solely on companies, for example, DTE Energy’s Monroe Power Plant in southeast Michigan could be liable for up to $1.2 billion. The country’s highest emitter — the Scherer Power Plant plant in Georgia owned by Georgia Power Co. — has a $1.7 billion liability under the same models.

Liability may also range from consumers to emitters or include shared responsibility. The “polluter-pays principle,” for instance, places liability on the emitter. An “ecological footprint” model, on the other hand, “results in all of the liability with consumers and thus zero liability for energy companies,” Pearce said. 

While Pearce’s research focused on the industry’s perspective, “it is clear that consumers are not paying the full costs for the energy they consume now. For the market to operate efficiently and thus enable consumers to make the best decisions, the full costs must be taken into account.”

Expanding research

Pearce says that legal challenges against companies or governments are likely to increase as public awareness about the impacts of climate change — and how those could be curbed — grows.

But Michael Gerrard, director of the Sabin Center for Climate Change Law at Columbia Law School, says legal precedent has already been set in the U.S. and that it is no longer promising to pursue monetary damages against companies for their emissions.

In four key cases, plaintiffs have been unable to successfully take on major energy companies, and judges have ruled that complaints may be best taken through legislative or executive action.

Gerrard said the term “liability” is “confusing and has lots of different meanings.”

“Shielding themselves from potential money damages from greenhouse gas emissions is a much lower threat” than it was five to 10 years ago, he said.

Gerrard added that more recent legal challenges against conventional power plants seek to block the permitting process. “I think we’ll see a lot of that. It’s just the money damages part that isn’t so prominent anymore.”

However, Gerrard said there is still a strong case to be made against utilities’ securities disclosures.

“Clearly utilities have an obligation to include in their securities disclosures the way their finances would be affected by current or pending environmental or climate regulations,” he said, referring specifically to the Clean Air Act and Clean Power Plan. “Some (utilities) are, some aren’t. There’s a wide variation in performance.”

Led by then-New York Attorney General Andrew Cuomo in 2008, the state began inquiring about utilities’ security disclosures on climate change, ultimately reaching an agreement for power companies to disclose climate risks to investors. Current New York Attorney General Eric Schneiderman is “using the same statute and same theory” in pursuing ExxonMobil, Gerrard said, following media reports last year about the company’s role in funding anti-climate change initiatives.

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