You’ve heard of the writing on the wall, but what is all that writing on the sidewalk and the street? You’ve seen it—yellow, orange, blue, red and white.

Some of it is pretty easy to decipher like “DS” for “Dig Safe” or “STM” for “steam” but some of the drawings look more like ancient hieroglyphics.

It’s incredible what’s running right beneath our feet, like an entire natural gas infrastructure, but we rarely take time to think about it.

In Massachusetts, we have over 21,000 miles of natural gas distribution pipeline running under our streets. That’s almost enough pipeline to circle all the way around the Earth. For perspective, you could drive from Boston to San Francisco and back three times and still not put 21,000 miles on your odometer.

I’ve been thinking about what’s under the street a lot over the past two years. In July 2011, I was introduced to a professor at Boston University, Nathan Phillips, who had embarked on a journey of mapping natural gas leaks in the City of Boston. Using a high tech sensor, Nathan was detecting leaks and translating them into incredible visual representations that called attention to the aging natural gas pipelines criss-crossing our city.

Maps created by Nathan Phillips of Boston University

After I saw Nathan’s maps, I couldn’t keep my eyes off of the ground. Whether I was walking or biking, I started to notice all kinds of infrastructure, not just natural gas, everywhere.

There were “Gardner Boxes” in front of the houses on my street—these are one type of emergency shut-off valves for gas service lines.

Emergency Shut-Off

Then there were the large, bold, golden “G”s on the street, sometimes accompanied by CI (which stands for cast iron) or PL (for plastic) or BS (for bare steel), or CS (for coated steel) 18-in or 12-in or 3-in (telling me the diameter of the pipeline), and NGrid or NStar (the name of the company that owns the pipeline).

Suddenly, I could tell a lot about my street just from looking down. But what I couldn’t tell from the markings alone was just how important natural gas infrastructure is for a safe, thriving and sustainable neighborhood. That took some digging of a different variety.

Leaking Pipes Contribute to Climate Change

What I found was surprising and unsettling. Massachusetts has some of the oldest natural gas pipelines in the country. Almost 4,000 miles of the pipeline in Massachusetts is cast iron and another 3,000 is what’s known as “unprotected steel” (meaning unprotected from corrosion). These two types of pipe are referred to as “leak-prone pipe” in the industry because they are highly susceptible to breaks, fractures, and corrosion. Cast iron pipe was first installed in the 1830s, and some of the pipe in Massachusetts that is still in service dates to the Civil War. The gas utilities have started to focus on replacing this “leak-prone” pipe, especially since the tragedies in San Bruno, California and Allentown, Pennsylvania brought home how dangerous old pipelines can be.

But replacing old and leaking pipelines isn’t solely about public safety. It’s also a matter of conserving a valuable natural resource and tackling climate change. Natural gas is up to 95% methane, a greenhouse gas that is 25 times more potent than carbon dioxide on a 100 year time frame. When natural gas is combusted, in your furnace or in a power plant, it emits much less carbon dioxide than oil or coal, but when it’s leaked directly into the air from a pipeline, it adds up to a significant source of greenhouse gas pollution.

Unfortunately, current methods for estimating just how much natural gas is leaking from pipelines aren’t very accurate. What we do know is that leaking pipelines in Massachusetts are releasing between 697,000 tons of CO2e and 3.6 million tons of CO2e every year. That’s a huge range, and one that we’re working to narrow with the help of Professor Phillips and his students. These leaks can also take a heavy bite out of gas customers’ pocketbooks, as a recent report prepared for Senator Ed Markey showed.

What You Can Do

Over the next few weeks, I’ll be posting more information here about the efforts to replace leak-prone pipeline in Massachusetts and what you can do to make sure that your street is both safe and climate friendly. Until then, here are a few tips to remember:

1) Dig Safe—You never know what types of pipelines, wires, or cables may be running under your lawn or sidewalk. Dig Safe will contact the utilities so that they can mark the lines for you. Even for small projects like planting a tree, always check in with Dig Safe before you dig. It’s free, and it’s required by law to keep you and your neighbors safe. You can check the website or simply call 811 before you dig.

2) Report Leaks—If you think you smell gas, put out all open flames and do not use lighters or light matches. Do not touch electric switches, thermostats or appliances. Move to a safe environment and call your gas company or 911 to have them come check it out. Here is the contact information for Massachusetts’ three largest gas companies: Columbia Gas, National Grid, and NStar Gas.

3) Conserve—It sounds simple, but using less is one of the most important steps you can take to reduce the climate impacts from natural gas. Contact MassSave for a free home energy audit.

4) Contact your Legislator—Legislation is pending in Massachusetts right now that would help fix these leaks. We’re supporting H.2933 and portions of S.1580. I’ll be writing more about this in the coming weeks, but in the meantime, you can take a look at the testimony we filed with partners like Clean Water Action.

Seagulls swarm overhead as garbage trucks dump their loads at the Central Landfill in 2011. Photo courtesy of Mary Murphy/The Providence Journal.

Two weeks ago, we took the first step toward filing suit against the companies that are supposed to be – but aren’t – collecting harmful landfill gas from the Central Landfill in Johnston, Rhode Island.

Because these companies are not collecting this gas, the Landfill is releasing pollutants into Rhode Island’s air.  I’ll write more on each of the main pollutants later, but for right now suffice it to say that hydrogen sulfide makes the air smell like rotten eggs and also poses health risks, while methane is a potent greenhouse gas.

By failing to collect landfill gas, the companies are not just dirtying the air; they are also violating the Clean Air Act.  And because they’re breaking the law, we can take them to court and try to get the Landfill’s air pollution under control.

While we take polluters to court, you can help clear the air in Johnston too.  Here are a few ways how:

1. Tell us your story.

   If you live near the Landfill and have smelled the Landfill, gotten sick, or had trouble selling your house, send me an email (mgreene@clf.org) or call me (401-351-1102).  Your stories will help us to paint a clear picture for the court as to exactly what’s going on in Johnston.

2. Don’t throw away food scraps.

   I know this one can be hard – I live on a small lot myself and don’t have much room for composting.  But for all of us who live in Rhode Island, every bit of food we throw away eventually breaks down in the Landfill and produces landfill gas.  This food could instead be composted and used to grow food at Rhode Island farms, or in your own gardens.  And if you can’t compost food scraps yourself, you might be able to find someone else to take them off your hands.  Check out ecoRI Earth.

3. Donate.

   Perhaps this one goes without saying, but CLF is a nonprofit organization that relies on gifts and grants to do the work we do.  So please consider giving – every bit helps.

With your help, we can get fix the gas collection system at the Central Landfill and get landfill gas out of Rhode Island’s air.

For miles around Rhode Island’s Central Landfill, the air often smells like rotten eggs.  In the Landfill, garbage degrades and gives off a gas that is part hydrogen sulfide (which produces the rotten-egg smell), part volatile organic compounds (which can cause cancer), and part methane (a potent greenhouse gas).  At well-run landfills, collection systems capture enough of this gas to avoid creating health and environmental hazards.  Here in Rhode Island, though, something is wrong.

That’s why yesterday CLF’s Rhode Island office notified companies associated with the Landfill that we intend to sue for violations of the federal Clean Air Act.

After a thorough investigation, we figured out that two companies – Broadrock Gas Services and its subsidiary Rhode Island LFG Genco – are not collecting landfill gas like they are supposed to be doing.  Instead, they have allowed part of their gas collection system to become submerged in water.  The gas that is not and cannot be captured by these underwater collectors instead escapes to the air we breathe.  We can tell for sure that gas is escaping because federal regulations don’t allow the air at a landfill’s surface to contain more than 500 parts per million of methane (above background levels in the air), but readings at the Landfill have been as high as 72,900.  By failing to capture harmful landfill gas, the companies have violated the Clean Air Act.

Broadrock and Genco have also been in the news lately for venting landfill gas or some byproduct directly into the atmosphere from a pipe rigged with a broom handle and held together with duct tape.  By venting this gas directly from a pipe to the air, the companies have again violated the Clean Air Act.

As the owner of the Landfill, Rhode Island Resource Recovery is legally responsible for Broadrock and Genco’s violations.  CLF Rhode Island has also learned that Resource Recovery has been operating the Landfill for the last sixteen years without a federally required permit.  By requiring Resource Recovery to get this long-missing permit – which should apply to Broadrock and Genco’s operations too – we hope to bring comprehensive oversight and a clear division of responsibilities to the Landfill.

Now that we’ve notified Broadrock, Genco, and Resource Recovery that we intend to sue – a formal step required by the Clean Air Act before initiating a citizen suit – we have to wait sixty days before filing a complaint in federal court.  But we can start negotiating to fix the problem immediately.  The recent discovery that Broadrock and Genco have been venting raw landfill gas into the air – and the landfill gas explosion that happened a few days ago – let us know that the situation is truly urgent.  And CLF Rhode Island’s notices are a strong first step in getting landfill gas under control here in Rhode Island, stopping the release of harmful pollutants, and making that pervasive rotten-egg smell go away for good.

[Read CLF Rhode Island’s notice of intent to sue here.]

A version of this article first appeared in the Sunday June 23 edition of the Rutland Herald /Times Argus.

Conflicting and confusing information is nothing new when it comes to climate change or big energy projects. The role of natural gas in meeting our energy needs is but the latest guest to this party.

Like most things in life, natural gas itself is neither all good nor all bad. True, natural gas is a relatively clean-burning fuel with fewer emissions than coal or oil. And currently natural gas prices are lower compared to oil. As a source for electricity, gas can be quickly brought on and off line and so fills a useful niche to balance intermittent renewable sources like solar and wind. But these benefits are only part of the equation.

Relatively clean-burning does not mean clean. 

Natural gas is still a fossil fuel. It contributes to climate change in very significant ways. The main component of natural gas is methane, a greenhouse gas 25 to 75 times more potent than carbon dioxide in terms of its ability to warm the Earth’s atmosphere.

The real damage comes from natural gas leaks.

And they occur. When an average leak rate of 3 percent is taken into account for the full natural gas life cycle — from the time it leaves the ground to the time it burns in your furnace or range — it turns out that increasing the supply of natural gas significantly increases emissions. That is not good for our climate.

Lower cost comes at a high price.

Natural gas prices are now low partly because of abundant supplies from fracking, an extraction method that uses water, sand and chemicals to force gas out of the ground. Vermont banned fracking because of concerns about the impact to water and the environment. But this practice continues elsewhere, and supplies used in Vermont come from fracked sources.

In Vermont, a proposed expansion of natural gas will cut through valuable wetlands and farmland in Addison and Chittenden Counties. Future plans include putting a pipeline across Lake Champlain, a development that would increase greenhouse gas emissions by more than 3 million tons over the life of the project — the equivalent of adding a half-million cars to the road.

One of the biggest problems of increasing our reliance on natural gas is that the pipes we put in place now will still be here to deliver gas in 50 to 100 years. Yet in that timeframe we must solidly break our addiction to fossil fuels — including natural gas.

Regionally across New England, momentum is developing to expand or build new gas pipelines. But rushing to build bigger pipes is not the answer. We can do better than throw up our hands and blindly accept expensive and environmentally damaging new pipelines at a time when we should be moving away from fossil fuels. Recognizing the impacts and providing offsets for any expansions that do occur is a must.

The first step should be to repair leaks and honestly account for and address emissions. It makes no sense to build expensive, bigger pipes while customers needlessly pay for gas and pollution that escape into the air.

The next step is to use gas and all fossil fuels wisely. By dramatically increasing efficiency, most homes and businesses could cut use by 20 to 30 percent. That would significantly reduce the need for more supply.

Finally, let’s make sure any new project helps and doesn’t hurt our climate and environment. We should keep sensitive and valuable environmental resources off the table.

We should limit supplies from fracking, and require offsets to reduce overall emissions for any new pipeline so we don’t add to our climate problems.

Natural gas will play an important role in our energy supply over the next decade, but let’s make sure it is a role that leads to a cleaner and healthier planet.

photo courtesy of kara newhouse@flickr.com

Expanding natural gas in Vermont moves us in the wrong direction to address climate change. The expansion increases greenhouse gas emissions, compounding Vermont’s contribution to climate change.

In detailed testimony filed with the Vermont Public Service Board, Conservation Law Foundation explained that the simplistic evaluation by Vermont Gas that the expansion will reduce emissions is simply wrong. Testimony from Dr. Elizabeth Stanton shows on pages 18-19 that expanding natural gas increases emissions more than three million tons over 100 years and brings environmental costs of an additional $76,000,000.

This project is not a good deal for Vermont.

Dr. Elizabeth Stanton shows that the emissions from the full life-cycle of the project result in significant increases in global warming pollution. This project will be around for a long time as will its greenhouse gases. Dr. Stanton explains on pg 9:

“The natural gas life cycle is the set of all processes related to the use of natural gas from its extraction, processing, and distribution, to its end-use combustion. Life-cycle analyses are studies that determine the upstream and downstream consequences of a particular product or service used by consumers.”

Its overall emissions include leaks of methane, a gas 25 to 72 times more potent than carbon dioxide when it comes to climate change.

Testimony by Dr. Jon Erickson, Dean of the Rubenstein School of Environment and Natural Resources at the University of Vermont shows that expanding gas results in locking us in to fossil fuels at a time our climate and energy goals require moving the opposite direction. He states at pg 6:

“Any expansion of the delivery of natural gas to customers in Vermont has the potential to substitute for other nonrenewable, carbon-based fuels (such as fuel oil), but also has the potential to displace current and future uses of renewable energy (such as wood-based home heating or district heating).”

His testimony goes on to state at pg 8:

“Beyond GHG-related risk, the extraction of natural gas supplies is using increasingly environmentally damaging procedures such as hydro-fracking, a practice that Vermont has temporarily banned within State borders. Environmental regulation in other States and Canadian Provinces poses a risk to the long-term stability of natural gas supplies.”

Let’s be honest. Increasing our reliance on fossil fuels, including natural gas, is a bad move.

Burying our garbage in landfills is a waste of resources, but it’s also a convenient way to get rid of stuff we don’t need or want. If there were clear alternatives to trashing our resources, would we use them? The Massachusetts Department of Environmental Protection (DEP) believes the answer is yes.

The DEP has finalized new rules that provide a permitting pathway for operations that process source separated materials – stuff like food waste or recyclable plastics that are not mixed with other wastes in the general trash stream. Source separated materials are distinguished from “waste”, so qualifying facilities will not be permitted as solid waste facilities. Previously a facility that sought to collect discarded material for recycling or some other reuse was considered a solid waste facility. This created barriers to the productive use of materials like food waste. The new regulations are a good step toward better management of our discarded materials.

Under the new rules, finalized November 23, DEP has created three size-based categories:

1. Small facilities (no permit required)
2. General permit facilities (certain activities permitted by-right)
3. Facilities that will require a new Recycling, Composting, and Conversion (RCC) permit

The good news is that these rules create a permitting pathway for anaerobic digestion (AD) facilities. AD is a process in which organic material, like food waste, is processed in an airtight container to create a gas similar to natural gas (high in methane). AD facilities can use the gas to fuel energy generators to create electricity and heat that can be used onsite or sold in the energy market.

AD facilities, if properly sited and appropriately operated, offer a win-win by managing food waste and generating a renewable gas for energy production. Rather than putting our food waste into a landfill where it does more harm than good, the energy in the food can be efficiency recovered for productive use.

“But what about composting?” you may be asking. DEP’s goals, as stated in the current draft Solid Waste Master Plan, include diverting 350,000 tons of organic waste per year from landfills. Some of this will be accomplished by AD facilities, but some diversion will be accomplished by composting. The new rules clarify which operations are permitted by DEP and which are permitted by the Department of Agricultural Resources (DAR).

Whether we create high quality fertilizers and soil amendments through composting, or energy and fertilizer through AD, we will be diverting organic material from landfill disposal. DEP’s new rules are a step in the right direction to better manage our resources for economic advantage and environmental gain.