HOUSTON, Texas -- Ten U.S. oil refineries, including six in Texas, have released levels of cancer-causing benzene into nearby communities above Environmental Protection Agency limits requiring companies to take action to reduce pollution.

An Environmental Integrity Project study used data from air samples taken at fence-line monitors every two weeks. Corey Williams, research and policy director with Air Alliance Houston, said with more than half of the nation's worst polluting refineries in Houston's backyard, he'd like to see more monitoring at sites in real time, and said it's time for companies to fix the problem.

"And to date, we haven't really seen more proactive compliance and enforcement efforts from either the federal EPA or state environmental-quality agencies," Williams said.

When regulators do enforce the law, Williams said fines and other punitive measures are considered by companies as negligible, just the cost of doing business. Industry groups and the Texas Commission on Environmental Quality both opposed the EPA's proposal for fence-line monitors, calling them unnecessary because refineries already were monitoring emissions.

Benzene, a chemical with a slightly sweet odor, evaporates from gasoline and oil, and is used in plastics, pesticides and other products. Williams said it's now clear industry monitoring efforts, which plugged data supplied from industry sources into a mathematical formula to determine risk levels, was flawed.

"However, now that we have the benzene fence-line monitoring program, we can see that the assumptions made in the modeling were not correct, and that there actually was a greater offsite impact than initially was thought," he said.

The worst offenders in Texas included Total Refinery in Port Arthur, Pasadena Refining outside Houston, and Flint Hills Resources in Corpus Christi. Williams' group is urging state officials to push industry to patch leaks, update pipes and do whatever is necessary to reduce pollution, to protect the health of workers, and the disproportionately low-income families and communities of color living near refineries.


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A new report shows Maine is exceeding the home-heating goals set forth in its ambitious four-year climate plan to reduce greenhouse-gas emissions. The state surpassed its goal of installing 100,000 heat pumps earlier this summer, and Gov. Janet Mills quickly set a new target of 275,000 by 2027.

Michael Stoddard, Efficiency Maine Trust executive director, said new refrigeration cycle technology is helping both the climate and consumers, who've struggled with volatile prices in home heating oil.

"The advent of highly effective at very cold temperatures and very cost-effective air-sourced heat pumps has been a huge breakthrough for us," Stoddard explained.

Close to 30% of Maine's greenhouse-gas emissions come from heating homes and businesses. The state has set a goal of going carbon neutral by 2045 and is aggressively promoting heat pumps to help reach that target.

The cold and rural state of Maine is the nation's most dependent on home heating oil, with nearly 60% of households reliant on the fuel for warmth, compared with just 4% nationally.

Stoddard said often, households will install a heat pump and continue to use heating oil as a backup source, but added a whole-home heat-pump system can save consumers roughly $1,000 a year.

"So, you can imagine what the impacts of that are, expanded across all the homes that we touch and that we will touch over the next decade," he said.

Stoddard noted many antiquated school buildings in rural Maine could also reap financial rewards by transitioning their heating systems, and said federal and state programs offering financial incentives, especially rebates, are helping drive consumer demand for more efficient heating technologies that also benefit the climate.


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NASA-funded research using satellites to study atmospheric nitrogen will examine how different farming approaches affect greenhouse gas emissions.

The $1.1 million grant will fund a team of scientists, including two at institutions in Maryland, who will use remote sensing satellites to look for accumulations of airborne ammonia and nitrogen in rural settings.

The researchers will then conduct soil sampling to determine which types of farming methods are better or worse for the climate.

Stephanie Yarwood, PhD - associate professor of environmental science and technology at the University of Maryland - is one of the principal investigators and said this research will help improve climate modeling.

"What we're really trying to do is make a connection between what a satellite can see, which is ammonia, and to make more of a link or less of a link depending on what we find, to nitrous oxide production," said Yarwood. "Because that's really what global models are trying to account for. They're trying to really understand, well how much greenhouse gas emission is there?"

She said as a greenhouse gas nitrous oxide is 300 times more powerful than CO2.

The grant runs for four years with research set to begin this winter.

While air quality measurements in cities are common, there is less data on rural areas. Yarwood said remote sensing satellite technology that can examine atmospheric chemistry at a continental scale is relatively new.

In studying soil contents, researchers hope to establish how microbial communities impact the release of nitrogen into the air and water.

Yarwood said the team will build mathematical models that can predict how nitrogen moves through the soil.

Researchers hope the work will offer hard data on the impact of various conservation practices and help policymakers and stakeholders decide how to spend both time and money.

"A lot of times, there's money invested, either from the government or from the producer," said Yarwood. "There's time in figuring new technologies out and applying those, there's some risk involved in that. I think we really need good data to be able to tell farmers, 'Yes, this is really something that's going to help', and we're going to see less nitrous oxide or not based on that."

The study includes a researcher from the University of California, Irvine - and one at the U.S. Department of Agriculture's Sustainable Agricultural Systems Laboratory in Beltsville.





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A handful of Iowa's biggest cities has been awarded $3 million to work on solutions to climate change at the local level.

The climate pollution reduction grants are part of a $5 billion program to assess climate change and come up with ways to address a steadily warming planet.

Pam Mackey-Taylor, director of the Iowa chapter of the Sierra Club, said when the state of Iowa declined to apply for the grants, it opened up the opportunities to individual communities. They will use the money to develop specific plans to reduce greenhouse gas emissions and other harmful air pollution at the local level.

"The cities of Iowa City, Cedar Rapids and Des Moines decided to pursue the grants," Mackey-Taylor explained. "They are going to be doing planning for not only the cities but the counties they're in and some of the neighboring counties."

Cedar Rapids and Iowa City together were awarded $2 million, and Des Moines received $1 million. Mackey-Taylor pointed out the money will be used on things such as making buildings more energy efficient and environmentally friendly. Iowa was one of just four states not to pursue grant funding on a statewide basis. The others were Florida, South Dakota and Kentucky.

The Environmental Protection Agency will help train local and tribal leaders on how best to plan for and use the money. Mackey-Taylor noted while the smaller grants are critical to addressing the problems at the local level, Iowa may have missed an opportunity to work on bigger issues by passing on the larger grants.

"We still have some challenges," Mackey-Taylor observed. "Our agriculture sector in Iowa generates 29% of the greenhouse gases. Our residential, commercial and industrial generate 27% of the state's greenhouse gases and our electricity and power plants generate 19%."

Iowa has made strides in reducing emissions in the electricity sector. More than half of the state's power is now generated by wind.