Project
Combating Short-Lived Climate Pollutants (SLCPs)
You encounter them every day: soot from auto exhaust and burning wood (black carbon), gases that make refrigerators and air conditioners cool (hydrofluorocarbons), natural gas that makes your stove work (methane), and ground-level ozone formed by sunlight and fossil-fuel emissions. Short-live climate pollutants are all around us. And controlling them holds great potential in the fight against climate change.
Short-lived climate pollutants (SLCPs) are so named because they last a relatively short time in the atmosphere, from a few days to a few decades. In contrast, carbon dioxide (CO2) can last centuries. Yet they’re a major contributor to climate change, degrade air quality, and have grave impacts on food security and the health of the world’s most vulnerable populations.
According to the Intergovernmental Panel on Climate Change, SLCPs are responsible for more than 30 percent of global warming (more recent studies estimate their contribute to be as high as 45 percent).
Effective control of SLCPs could create significant progress in the near-term fight against climate change, buying time to implement long-term solutions. It could also mean better air quality, a reduction in premature deaths from respiratory and heart disease, and improved crop yields.
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5 things you should know about methane
Although its presence in the atmosphere is less than that of carbon dioxide (CO2)—the most abundant and well-known greenhouse gas—methane is much more effective at retaining heat due to its chemical composition. Therefore, adding smaller amounts of methane to the atmosphere can have an effect equal to that of adding tremendous amounts of CO2. Since 2006, the amount of methane in the atmosphere has grown considerably—by about 25 million tons per year. Studies have associated this increase with the leakage and burning of methane from the extraction of unconventional hydrocarbons through the process of fracking, or hydraulic fracturing. Although extracting gas through fracking is sold as a “greener” alternative to other fossil fuels, it is a false narratiave that must be combatted. In general, all activities that cause methane emissions aggravate the climate crisis and the increasingly urgent need to combat air pollution. The common understanding of methane is inaccurate. Therefore, it’s necessary to generate more awareness about what it is and what its real impacts are. What follows are five basic facts about methane. 1. Methane is a short-lived greenhouse gas and climate pollutant Methane is a greenhouse gas.The Greenhouse Effect is a natural phenomena in which the atmosphere, composed of different gases, captures some rays of the sun and keeps them trapped in order to balance the temperature of the planet. When an excess of gases such as methane are emitted, the atmosphere traps more heat than necessary, leading to global warming. Methane has 67 times more power than CO2 to warm the planet over a 20-year period. Its emissions are responsible for nearly 25 percent of global warming. And since it stays less time in the atmosphere—12 years on average (CO2 stays for centuries)—it is among the Short Lived Climate Pollutants (SLCPs), which cause 40-45 percent of global warming and damage air quality. 2. Methane primarily is produced from human sources About 60 percent of the methane in the atmosphere is considered by scientists to be caused by human activity, while the other 40 percent comes from natural sources like wetlands, volcanoes, and permafrost. Human sources include livestock, gas and petroleum exploitation, rice farming, mining (particularly coal mining), and landfills. It should be noted that, according to scientific evidence, reservoirs are also an important source of methane. They generate 1.3 percent of all greenhouse gases worldwide each year, more than all of Canada's polluting emissions, and 80 percent of that pollution is from methane. 3. Methane directly and indirectly degrades air quality Large amounts of methane are intentionally leaked or released during the exploitation, processing, and transportation of oil and gas. In the United States alone, such direct emissions amount to 13 million tons each year. When released into the atmosphere, methane is accompanied by other toxic pollutants such as benzene, formaldehyde, and ethylbenzene. In addition, by interacting with solar radiation, methane promotes the formation of ground-level ozone (O3), another short-lived climate pollutant (CCVC) and the main component of smog. Methane gas flaring also produces black carbon and volatile organic compounds (VOCs), which are also CCVCs. 4. Methane causes serious damage to human health As mentioned, methane emissions promote the formation of ozone found in the lower layers of the atmosphere, which has serious impacts on public health. It irritates the airways, generates a feeling of burning and shortness of breath, complicates asthma, causes lung dysfunction and even premature death, and alters the immune system's response, reducing its ability to respond to diseases such as COVID-19, which mainly affects the airways. And since methane burning generates black carbon, it is relevant to point out that it is a key component of particulate matter (PM 2.5)—particles that are 35 times smaller than a grain of sand. These particles cannot be filtered or retained naturally in the nose, and can even enter the lungs. Particulate matter is the air pollutant most frequently associated with cardiovascular, respiratory, and pulmonary diseases, including lung cancer. 5. It is urgent to regulate and curb methane emissions Since methane, in addition to aggravating the climate crisis, deteriorates air quality and with it human health, it is urgent to act to curb its emissions. Civil society must demand that governments efficiently regulate methane emissions from the hydrocarbon industry and other sectors such as coal mining and industrial livestock. In addition, we must demand the monitoring of emissions, as well as the production and dissemination of timely information about methane’s damage to our air quality.
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Contamination and COVID-19: Why didn't air quality Improve in the Valley of Mexico?
Measures adopted to deal with the global health pandemic caused by COVID-19 have led to a reduction in some atmospheric pollutants, which has considerably improved air quality in various cities around the world. Yet in the metropolitan area of the Valley of Mexico (MCMA)—which includes Mexico City and surrounding towns—air quality has not improved despite the suspension of activities associated with sources of pollution like traffic and industry. Months before the health emergency was declared in late March 2020, the air quality reported by the Valley’s Atmospheric Monitoring System was in the range of "regular" to "bad," due primarily to vehicle congestion. With restrictions on mobility established due to the pandemic, vehicle traffic decreased by up to 70% and, with it, so did some of the air pollution. According to official information, distancing measures caused a reduction in carbon monoxide and nitrogen oxides—of 58 and 32 percent, respectively. However, tropospheric ozone (O3), one of the most damaging pollutants to air quality and human health, did not decrease significantly (only 3 or 4 percent, according to official data). That’s why, in May, two months after measures were adopted to address the health crisis, air quality in the Valley of Mexico remained at the same parameters as the beginning of the year—that is, ranging from "regular" to "bad," according to the Atmospheric Monitoring System. The question that arises, then, is WHY? What causes air pollution? Various gases and compounds contaminate the air. Primary pollutants—like carbon dioxide (CO2), nitrogen oxides (NOx) and volatile organic compounds (VOC)—are directly discharged into the atmosphere. Secondary pollutants, like tropospheric ozone (O3), form in the atmosphere as a result of the chemical transformation of those primary pollutants. Tropospheric ozone is formed from the interaction of sunlight with "precursor gases," including volatile organic compounds and nitrogen oxides. Now, there are three factors that actually affect air quality: weather conditions, topography, and concentrations of one or more pollutants at levels that can harm the environment and human health. These concentrations are measured by official monitoring systems, like the MCMA Atmospheric Monitoring System. The World Health Organization establishes concentration levels of pollutants that should not be exceeded over a specific period. For tropospheric ozone, the recommended value is 50 parts per billion (ppb) over an eight-hour average. But Mexican regulations are more lax and establish a lower limit for this compound: a concentration less than or equal to 95 ppb on an hourly average (that is, in a 60-minute time interval). In addition, to activate an environmental contingency for ozone, concentrations must be greater than 154 ppb (hourly average). This standard implies less protection for the population's health. At the beginning of this year, the hourly ozone concentration in the Valley of Mexico averaged only 23 ppb, but it has risen since then. Despite the restrictions resulting from the health crisis, the average hourly concentration of ozone was 41 ppb in April and 45 ppb in May. Also, from January to May, 99 days were recorded in which ozone concentrations exceeded the 95 ppb limit. Why did concentrations of ozone increase? The restriction on mobility during the health contingency was not adequate to decrease concentrations of ozone in the atmosphere for two reasons: first, the sources of this compound are not limited to the use of vehicles; and second, the period of social isolation coincided with the so-called ozone season, a time of the year when the concentrations rise due to the increase of solar radiation and the decrease of rain and wind. As previously mentioned, tropospheric ozone is formed by the interaction of sunlight with precursor gases. Among these gases are nitrogen oxides—mainly generated by the combustion processes of automobiles, especially diesel engines—and volatile organic compounds, which arise from more diverse sources: the use of solvents, leaks of liquefied petroleum gas in heaters and stoves, cosmetic and cleaning products, and evaporated fuel in gas stations and automobiles without evaporative emissions control. According to official data, during social isolation, volatile organic compounds were only reduced by 15 percent, including all their emission sources. On the other hand are forest fires, a major source of ozone precursor gases. From January 1 to May 3 of this year, in Mexico City alone there were 644 forest fires— lower in number compared to the same period in 2019, but equally as intense. As for the ozone season, which begins the last week of February and ends with the first rains in June, the average temperature in the Valley of Mexico was higher this year. In April, it was 2°C higher than the average recorded in the same month between 1981 and 2010—the hottest April in recorded history. Because the temperature is directly related to solar radiation and lack of wind, its increase explains the higher ozone concentrations. The sum of these factors contributed to the fact that ozone concentrations actually increased despite the restrictions established by the pandemic. This, in turn, led to the residents of the Valley of Mexico continuing to experience poor air quality and suffering its negative health impacts. Why reducing ozone is good for public health and the climate Ozone not only affects air quality and thus public health. It also has the ability to absorb sunlight and heat the atmosphere, meaning it is a short-lived climate pollutant (SLCP). Because its emissions aggravate the climate crisis, more than 11,000 scientists from around the world have highlighted the need to reduce SLCPs in order to rapidly combat global warming. The intensity of the forest fires and the particularly high temperatures of this year's “ozone season” demonstrate the effects of the climate crisis that we are failing to adequately confront. That’s why it’s imperative that the government implement actions to reduce emissions of precursors gases—not only during the health emergency, but also when we get through it, when motorized transportation (a source of nitrogen oxides) is reactivated. Improved controls on the type of cars on the road, based on their polluting potential, and personal choices like biking, also recommended to reduce the risks of contagion, would help to achieve this objective, reduce global warming, and improve the health of those living in the Valley of Mexico. In addition, society must commit to measures of regulation, communication and education that curb consumer habits and improve on the production and distribution of goods and services that continue to emit volatile organic compounds (another ozone precursor) on a daily basis. Restricting the production and use of aerosol products, as well as repairing and preventing leaks of liquefied petroleum gas, would help to reduce these emissions. Finally, it’s necessary to strengthen the country's weak environmental policy and combat non-compliance with environmental health standards, which has resulted in an insufficient reduction in air pollution. Mexican air quality standards must be updated to set stricter limits that are compatible with international standards and the protection of the human right to health. The above are just some examples of actions that authorities and society can take to show that we have learned a lesson and will do what is necessary to improve air quality and face possible new health crises, as well as to combat the climate crisis that threatens to end the world as we know it today.
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3 ways to maintain hope in the face of the climate crisis
Those of us who work on environmental issues are bombarded on a daily basis with headlines repeating the message: “Time is up, our days are numbered.” And, to tell the truth, rarely do they seem exaggerated: the IPCC reports, fires in Australia, the disillusionment of COP25, the mocking of the youth movement, assassinations and threats to environmental defenders. During dinner parties and casual get-togethers, people who know I work on environmental issues ask me what they can do for our planet. We start by talking about garbage: produce less of it. This, although seemingly basic, leads to long and heated conversations. Why? Because it questions our means of consumption, how we transport ourselves, feed ourselves, and dress. It makes us analyze our lifestyle and ask ourselves what “quality of life” means for us. Our garbage, after all, is the result of a long chain of emissions, which include the exploitation of land, species, and people. The truth is, everything is connected and it’s impossible to detach ourselves from our impact on the Earth. It’s through this chain of thoughts that many of us fall into episodes of “eco-anxiety.” It’s an increasingly common condition that, if left untreated, can be detrimental to our health. In 2017 the American Psychological Association (APA) described eco-anxiety as “a chronic fear of environmental doom… Watching the slow and seemingly irrevocable impacts of climate change unfold, and worrying about the future for oneself, children and later generations.” The strange thing about this condition is that it can stop us from acting. We might begin to believe there’s nothing we can do and, then, stop paying attention. We might become more lax with our consumption habits and end up aggravating the problem. So what can we do? From what I’ve gathered, our actions can be divided into three areas: the individual, the community, and the citizen-consumer. First things first: Be good to yourself A general rule for helping others is to first help yourself. The climate crisis affects our physical health, food security, human rights, and mental health. According to the APA, emotional responses are normal and negative emotions are necessary for making decisions and living a full life. But extreme emotions and the lack of a plan to resolve the problem can interfere with our ability to think rationally and behave appropriately. Not to mention the fact that those suffering losses due to environmental catastrophes (hurricanes, droughts, and floods) may develop post-traumatic stress. To confront these emotions, the APA suggests that we: Believe in our own resilience and know that we can overcome obstacles. Practice optimism and learn from our experiences. Cultivate self-regulation and emotional self-awareness in order to develop long-term strategies; knowing how to detect them prevents episodes from worsening. Find meaning in your life. Faith or religion work for some; for others it’s meditation or building community. The point is to find something that gives you a sense of peace. Individual actions do help, and people united for a cause can make a difference. Rather than punish ourselves for everything that we can’t do, let’s begin to talk about what we can. How many emissions can we cut back on by riding a bicycle? How many plastic bags can we divert from the sea? How does our consumption help the local economy and our environment? And always, always, take a daily dose of nature to inspire yourself. Second: Your immediate circle Recently, single-use plastic bags were banned in Mexico City. More than one person said that it violated their right to shop as they please; others complained they didn’t know how to shop anymore. I’ve used cloth bags for years. I could have just rejoiced in my own environmental righteousness and bragged on Twitter. Instead I asked myself, “Why not share some recommendations?” Practices that I had already applied to my house were well received by friends and neighbors because they were practical. Building relationships, however brief, is a step toward strengthening our community. Also, it helps to maintain perspective and a sense of humor. Get together with neighborhood groups, volunteer with organizations whose cause you support. Donating time, money, or materials is taking a step beyond your individual actions. Have a friend who wants to eat less meat? Offer them your best vegetarian recipes! Do you know how to program or do graphic design? Do you have a pick up truck? Surely there are groups who would appreciate your help. At AIDA, for instance, we’re often looking for volunteers and interns. The APA recognizes the impacts of the climate crisis on the mental health of certain communities; they are not the same in a city as they are in an area at risk of environmental disaster, or in an indigenous community. Affected communities confront a loss of social cohesion and the loss of important spiritual or recreational places. They also witness an increase in violence, including racial violence, as certain groups become increasingly persecuted. Furthermore, a loss of identity ruptures the unity of these communities, as is happening with the Inuit of Greenland or as we at AIDA have seen in displaced indigenous and riverine populations in the Amazon. Third (I’m sorry): We have to talk about politics and civic engagement This may be a subject you don’t particularly enjoy, but you’re needed here too. The wastewater produced in your home is but a drop compared to untreated industrial waste being dumped into a river. You could ride your bike everyday, but you would still be living in a country that permits industries to emit volatile carcinogenic and greenhouse gases into the atmosphere without accountability. While our goodwill does matter, it just doesn’t have as large an impact as the will (and obligations) of governments and industries to do things right and work for the health of all living things. In Latin America, the election of our local representatives may work differently than it does in the United States. But that doesn’t free us from the responsibility to elect representatives that will work for a cleaner and more resilient future. Indeed, we must demonstrate our interest in that future and demand that they work toward it. Environmental writer Emma Marris explained it well in her New York Times column: “The climate crisis is not going to be solved by personal sacrifice. It will be solved by electing the right people, passing the right laws, drafting the right regulations, signing the right treaties—and respecting those treaties already signed, particularly with indigenous nations. It will be solved by holding the companies and people who have made billions off our shared atmosphere to account.” The balance we’re seeking in AIDA We are proud to be an organization made up of professionals who are deeply passionate about the environment. On a personal level, we share our ideas with each other about how to create a better planet. On a community level, we all support the organization, and there are also those of us that organize civic and neighborhood events. On the level of public policy and participation, AIDA works for environmental justice. We empower communities with the knowledge and tools they need to safeguard and monitor their rights. We take emblematic cases to court and before international bodies to ensure that companies and governments live up to their obligations. We believe that a healthy and equitable future is possible.
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