Photo by Josh Lopez, courtesy of the Sierra Club.

After the Supreme Court issued a stay of the EPA’s Clean Power Plan pending its review by the D.C. Circuit, many Republican governors halted compliance efforts in their states, while most Democratic governors opted to continue. Among these was Virginia Governor Terry McAuliffe, who plans to unveil a draft state implementation plan this fall.

Deciding to move forward on President Obama’s signature climate effort was an easy call. Polls show strong support for reducing carbon pollution, and the Governor wants to prove himself a team player who supports his president and his party. McAuliffe often reiterates his conviction that climate change is already producing extreme weather and increasingly severe coastal flooding in Virginia, making government action urgent.

Governor McAuliffe has another choice before him now: he can craft a compliance plan that moves Virginia firmly in the direction of clean energy and lower carbon emissions, or he can adopt one that allows unbridled growth in new power generation from natural gas. The latter could still meet the letter of the law, but it would hugely increase greenhouse gas emissions from Virginia power plants.

McAuliffe has this choice because EPA’s rules come in two parts: the Clean Power Plan addresses existing power plants under one section of the Clean Air Act, while new power plants are addressed under another section of that law. As a result of the statutory structure and EPA’s rules, states can choose to cover both under one set of rules with a total cap on utilities’ CO2 emissions, or they can address new and existing sources separately.

If a state chooses to cover both under a single cap, new generation can be added up to the cap or go beyond if the utility buys emission allowances from another utility. But if a state treats new and existing sources separately, then new sources can grow without limit as long as each new unit meets a unit-specific standard. Of course, building more fossil-fueled power plants of any type will increase carbon emissions, at a time when the U.S. desperately needs to cut back.

The carbon reduction target EPA set for Virginia under the Clean Power Plan is extremely modest. EPA’s numbers show Virginia can meet the target for existing sources simply by not increasing emissions. If the state also includes new power plants under the cap, however, it creates a real incentive to invest in clean energy.

But there’s a problem. Dominion Resources, the Richmond-based parent company of Dominion Virginia Power, is heavily invested in the natural gas sector, primarily transmission and storage. That has led Dominion to lobby for an implementation plan that covers only existing power plants.

Excluding new sources would leave the company free to build as many new natural gas-burning power plants in the state as it wants, locking in years of increased carbon pollution, and further boosting demand for fracked gas and pipeline capacity. Dominion’s plans call for more than 9,500 megawatts of new gas generation in Virginia, equivalent in carbon impact to building eight average-sized coal plants in the state.

McAuliffe can do what Dominion wants, or he can do the right thing for the climate. He can’t do both.

The stakes are high on both sides. McAuliffe has made job creation his number one priority, and he lures new industry to the state with the promise of lower-than-average electricity rates. Dominion says supporting its natural gas plans is the way to deliver on that promise. Whether that is true or not doesn’t count in this calculus; with state law limiting governors to a single term, McAuliffe is focused on the present.

But adopting a plan that allows unlimited increases in greenhouse gas emissions would run contrary to Virginia’s long-term interests. Not only is the state on the front lines of sea level rise, it needs predictable, affordable electricity prices for decades to come. And nothing can provide that better than renewable power and increased energy efficiency.

Neither Dominion nor anyone else can guarantee the price of natural gas over the life of a new power plant. Questions of price and supply bedevil even the best analysts and make forecasting risky. Moreover, the growing awareness of the climate impacts of methane from leaking wells and pipelines is already producing calls for tighter regulation of natural gas. A carbon tax or cap-and-trade legislation would also make all fossil fuels more expensive relative to carbon-free renewables.

While the cost of using natural gas can only go up, the costs of wind, solar and battery storage are expected to continue their astonishing declines. Advances in energy efficiency promise huge savings for states that pursue programs to help customers cut their energy use.

From a bill-payer’s perspective, then, investments in clean energy make more sense than building gas plants, even without taking federal regulations into consideration. Recent analyses show Virginia can cap carbon pollution from new power plants and still save money for electricity customers.

Environmental groups say their number one energy priority this year is to ensure Virginia adopts a Clean Power Plan that includes both existing and new sources, and they are counting on Governor McAuliffe to deliver. Their message is simple: if McAuliffe wants to be on the climate team, Virginia’s compliance plan must reduce CO2 emissions, not let them grow.