What sort of fabulous new energy systems will the world possess in 2040? Which fuels will supply the bulk of our energy needs? And how will that change the global energy equation, international politics and the planet’s health? If the experts at the U.S. Department of Energy (DOE) are right, the startling “new” fuels of 2040 will be oil, coal and natural gas—and we will find ourselves on a baking, painfully uncomfortable planet.
It’s true, of course, that any predictions about the fuel situation almost three decades from now aren’t likely to be reliable. All sorts of unexpected upheavals and disasters in the years ahead make long-range predictions inherently difficult. This has not, however, deterred the DOE from producing a comprehensive portrait of the world’s future energy system. Known as the International Energy Outlook (IEO), the assessment incorporates detailed projections of future energy production and consumption. Although dense with statistical data and filled with technical jargon, the 2013 report provides a unique and disturbing picture of our planetary future.
Many of us would like to believe that, by 2040, the world will be far along the path toward a green industrial future with wind, solar and renewable fuels providing the bulk of our energy supplies. The IEO assumes otherwise. It anticipates a world in which coal—the most carbon-intense of all major fuels—still supplies more of our energy than renewables, nuclear and hydropower combined.
The world it foresees is also one in which oil remains a preeminent source of energy, while hydro-fracking and other drilling techniques for extracting unconventional fossil fuels are far more widely employed than today. Wind and solar energy will also play a bigger role in 2040, but—as the IEO sees it—will still represent only a small fraction of the global energy mix.
Admittedly, International Energy Outlook is a government product of this moment with all the limitations that implies. It envisions the future by extrapolating from current developments. It is not visionary. Its authors can’t imagine energy breakthroughs that have yet to happen, or changes in world attitudes that may affect how energy is dealt with or events like wars, environmental disasters and global economic recessions or depressions that could alter the world’s energy situation. Nonetheless, because it assesses current endeavors that are sure to have long-lasting repercussions, like the present massive worldwide investments in shale oil and shale gas extraction, it provides an extraordinary resource for imagining the energy crisis in our future.
Among its major findings are three fundamental developments:
- Global energy use will continue to rise rapidly, with total world consumption jumping from 524 quadrillion British thermal units (BTUs) in 2010 to an estimated 820 quadrillion in 2040, a net increase of 56 percent. (A BTU is the amount of energy needed to heat one pound of water by one degree Fahrenheit.)
- An increasing share of world energy demand will be generated by developing countries, especially those in Asia. Of the nearly 300 quadrillion BTUs in added energy needed to meet global requirements between now and 2040, some 250 quadrillion, or 85 percent, will be used to satisfy rising demand in the developing world.
- China, which only recently overtook the U.S. as the world’s leading energy consumer, will account for the largest share—40 percent—of the growth in global consumption over the next 30 years.
These projections may not in themselves be surprising, but if accurate, the consequences for the global economy, world politics and the health and well-being of the planetary environment will be staggering. To meet constantly expanding world requirements, energy producers will be compelled to ramp up production of every kind of fossil fuel at a time of growing concern about the paramount role those fuels play in fostering runaway climate change. Meanwhile, the shift in the center of gravity of energy consumption from the older industrial powers to the developing world will lead to intense competition for access to available supplies.
To fully appreciate the significance of the IEO’s findings, it is necessary to consider four critical trends: the surprising resilience of fossil fuels, the degree to which the world’s energy will be provided by unconventional fossil fuels, the seemingly relentless global increase in emissions of carbon dioxide and significant shifts in the geopolitics of energy.
The Continuing Predominance of Fossil Fuels
Anyone searching for evidence that we are transitioning to a system based on renewable sources of energy will be sorely disappointed by the projections in the 2013 International Energy Outlook. Although the share of world energy provided by fossil fuels is expected to decline from 84 percent in 2010 to 78 percent in 2040, it will still tower over all other forms of energy. In fact, in 2040 the projected share of global energy consumption provided by each of the fossil fuels (28 percent for oil, 27 percent for coal and 23 percent for gas) will exceed that of renewables, nuclear and hydropower combined (21 percent).
Oil and coal continue to dominate the fossil-fuel category despite all the talk of a massive increase in natural gas supplies—the so-called shale gas revolution—made possible by hydro-fracking. Oil’s continued supremacy can be attributed, in part, to the endless growth in demand for cars, vans and trucks in China, India, and other rising states in Asia. The prominence of coal, however, is on the face of it less expectable. Given the degree to which utilities in the U.S. and Western Europe are shunning coal in favor of natural gas, the prominence the IEO gives it in 2040 is startling. But for each reduction in coal use in older industrialized nations, we are seeing a huge increase in the developing world, where the demand for affordable electricity trumps concern about greenhouse gas emissions.
The continuing dominance of fossil fuels in the world’s energy mix will not only ensure the continued dominance of the great fossil-fuel companies—both private and state-owned—in the energy economy, but also bolster their political clout when it comes to decisions about new energy investment and climate policy. Above all, however, soaring fossil-fuel consumption will result in a substantial boost in greenhouse gas emissions, and all the disastrous effects that come with it.
The Rise of the “Unconventionals”
At present, most of our oil, coal and natural gas still comes from “conventional” sources—deposits close to the surface, close to shore and within easy reach of transportation and processing facilities. But these reservoirs are being depleted at a rapid pace and by 2040—or so the DOE’s report tells us—will be unable to supply more than a fraction of our needs. Increasingly, fossil fuel supplies will be of an “unconventional” character—materials hard to refine and/or acquired from deposits deep underground, far from shore or in relatively inaccessible locations. These include Canadian tar sands, Venezuelan extra-heavy crude, shale gas, deep-offshore oil and Arctic energy.
Until recently, unconventional oil and gas constituted only a tiny share of the world’s energy supply, but that is changing fast. Shale gas, for example, provided a negligible share of the U.S. natural gas supply in 2000; by 2010, it had risen to 23 percent; in 2040, it is expected to exceed 50 percent. Comparable increases are expected in Canadian tar sands, Venezuelan extra-heavy crude and U.S. shale oil (also called “tight oil”).
By definition, unconventional fuels are harder to produce, refine and transport than conventional ones. In most cases, this means that more energy is consumed in their extraction than in the exploitation of conventional fuels, with more carbon dioxide being emitted per unit of energy produced. As is especially the case with fracking, the extraction of unconventional fuels normally requires significant infusions of water, raising the possibility of competition and conflict among major water consumers over access to supplies that, by 2040, will be severely threatened by climate change.
Relentless Growth in Carbon Emissions
By 2040, humanity will be burning far more fossil fuels than today: 673 quadrillion BTUs, compared to 440 quadrillion in 2010. The continued dominance of fossil fuels, rising coal demand and a growing reliance on unconventional sources of supply can only have one outcome, as the IEO makes clear: a huge jump in carbon dioxide and other greenhouse gas emissions.
Carbon dioxide (CO2) is the most prominent of the anthropogenic greenhouse gases being pumped into the atmosphere, and the combustion of fossil fuels is the primary source of that CO2; hence, the IEO’s projections on energy-related carbon emissions constitute an important measure of humankind’s ongoing role in heating the planet.
And here’s the bad news: as a result of the continued reliance on fossil fuels, global carbon emissions from energy are projected to increase by a stunning 46 percent between 2010 and 2040, jumping from 31.2 billion to 45.5 billion metric tons. No more ominous sign could be found of the kind of runaway global warming likely to be experienced in the decades to come than this grim figure.
In the IEO projections, all fossil fuels and all of the major consuming regions contribute to this nightmarish future, but coal is the greatest culprit. Of the extra 14.3 billion metric tons of CO2 to be added to global emissions over the next 30 years, 6.8 billion, or 48 percent, will be generated by the combustion of coal. Because most of the increase in coal consumption is occurring in China and India, these two countries will have a major responsibility for accelerating the pace of global warming. China alone is expected to contribute half of the added CO2 in these decades; India, 11 percent.
New Geopolitical Tensions
Finally, the 2013 edition of International Energy Outlook is rife with hints of possible new geopolitical tensions generated by these developments. Of particular interest to its authors are the international implications of humanity’s growing reliance on unconventional sources of energy. While the know-how to extract conventional energy resources is by now widely available, the specialized technology needed to exploit shale gas, tar sands and other such materials is far less so, giving a clear economic advantage in the IEO’s projected energy future to countries which possess these capabilities.
One consequence, already evident, is the dramatic turnaround in America’s energy status. Just a few years ago, many analysts were bemoaning the growing reliance of the U.S. on energy imports from Africa and the Middle East, with an attendant vulnerability to overseas chaos and conflict. Now, thanks to American leadership in the development of shale and other unconventional resources, the U.S. is becoming less dependent on imported energy and so finds itself in a stronger position to dominate the global energy marketplace.
In one of many celebratory passages on these developments, the IEO affirms that a key to “increasing natural gas production has been advances in the application of horizontal drilling and hydraulic fracturing technologies, which made it possible to develop the country’s vast shale gas resources and contributed to a near doubling of total U.S. technically recoverable natural gas resource estimates over the past decade.”
At the same time, the report asserts that energy-producing countries that fail to gain mastery over these new technologies will be at a significant disadvantage in the energy marketplace of 2040. Russia is particularly vulnerable in this regard: heavily dependent on oil and gas revenues to finance government operations, it faces a significant decline in output from its conventional reserves and so must turn to unconventional supplies; its ability to acquire the needed technologies will, however, be hindered by its historically poor treatment of foreign companies.
China is also said to face significant challenges in the new energy environment. Simply to meet the country’s growing need for energy is likely to prove an immense challenge for its leaders, given the magnitude of its requirements and the limits to China’s domestic supplies. As the world’s fastest growing consumer of oil and gas, an increasing share of its energy supplies must be imported, posing the same sort of dependency problems that until recently plagued American leaders. The country does possess substantial reserves of shale gas, but lacking the skills needed to exploit them, is unlikely to become a significant producer for years to come.
The IEO does not discuss the political implications of all this. However, top U.S. leaders, from the president on down, have been asserting that America’s mastery of new energy technologies is contributing to the nation’s economic vitality, and so enhancing its overseas influence. “America’s new energy posture allows us to engage from a position of greater strength,” said National Security Advisor Tom Donilon in an April speech at Columbia University. “Increasing U.S. energy supplies act as a cushion that helps reduce our vulnerability to global supply disruptions and price shocks. It also affords us a stronger hand in pursuing and implementing our international security goals.”
The DOE’s report avoids such explicit language, but no one reading it could doubt that its authors are thinking along similar lines. Indeed, the whole report can be viewed as providing ammunition for the pundits and politicians who argue that the emerging global energy equation is unusually propitious for the U.S. (so long, of course, as everyone ignores the effects of climate change)—an assessment that can only energize advocates of a more assertive U.S. stance abroad.
The World of 2040
The 2013 International Energy Outlook offers us a revealing peek into the thinking of U.S. government experts—and their assessment of the world of 2040 should depress us all. But make no mistake, none of this can be said to constitute a reliable picture of what the world will actually look like at that time.
Many of the projected trends are likely to be altered, possibly unrecognizably, thanks to unforeseen developments of every sort, especially in the climate realm. Nonetheless, the massive investments now being made in conventional and unconventional oil and gas operations will ensure that these fuels play a significant role in the energy mix for a long time to come—and this, in turn, means that international efforts to slow the pace of planetary warming are likely to be frustrated. Similarly, Washington’s determination to maintain U.S. dominance in the exploitation of unconventional fuel resources, combined with the desires of Chinese and Russian leaders to cut into the American lead in this field, is guaranteed to provoke friction and distrust in the decades to come.
If the trends identified in the DOE report prove enduring, then the world of 2040 will be one of ever-rising temperatures and sea levels, ever more catastrophic storms, ever fiercer wildfires, ever more devastating droughts. Can there, in fact, be a sadder conclusion when it comes to our future than the IEO’s insistence that, among all the resource shortages humanity may face in the decades to come, fossil fuels will be spared? Thanks to the exploitation of advanced technologies to extract “tough energy” globally, they will remain relatively abundant for decades to come.
So just how reliable is the IEO assessment? Personally, I suspect that its scenarios will prove a good deal less than accurate for an obvious enough reason. As the severity and destructiveness of climate change becomes increasingly evident in our lives, ever more people will be pressing governments around the world to undertake radical changes in global energy behavior and rein in the power of the giant energy companies. This, in turn, will lead to a substantially greater emphasis on investment in the development of alternative energy systems plus significantly less reliance on fossil fuels than the IEO anticipates.
Make no mistake about it, though: the major fossil fuel producers—the world’s giant oil, gas and coal corporations—are hardly going to acquiesce to this shift without a fight. Given their staggering profits and their determination to perpetuate the fossil-fuel era for as a long as possible, they will employ every means at their command to postpone the age of renewables. Eventually, however, the destructive effects of climate change will prove so severe and inescapable that the pressure to embrace changes in energy behavior will undoubtedly overpower the energy industry’s resistance.
Unfortunately, none of us can actually see into the future and so no one can know when such a shift will take place. But here’s a simple reality: it had better happen before 2040 or, as the saying goes, our goose is cooked.
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By Ana Maldonado-Contreras
- Your gut is home to trillions of bacteria that are vital for keeping you healthy.
- Some of these microbes help to regulate the immune system.
- New research, which has not yet been peer-reviewed, shows the presence of certain bacteria in the gut may reveal which people are more vulnerable to a more severe case of COVID-19.
You may not know it, but you have an army of microbes living inside of you that are essential for fighting off threats, including the virus that causes COVID-19.
How Do Resident Bacteria Keep You Healthy?<p>Our immune defense is part of a complex biological response against harmful pathogens, such as viruses or bacteria. However, because our bodies are inhabited by trillions of mostly beneficial bacteria, virus and fungi, activation of our immune response is tightly regulated to distinguish between harmful and helpful microbes.</p><p>Our bacteria are spectacular companions diligently helping prime our immune system defenses to combat infections. A seminal study found that mice treated with antibiotics that eliminate bacteria in the gut exhibited an impaired immune response. These animals had low counts of virus-fighting white blood cells, weak antibody responses and poor production of a protein that is vital for <a href="https://doi.org/10.1073/pnas.1019378108" target="_blank">combating viral infection and modulating the immune response</a>.</p><p><a href="https://doi.org/10.1371/journal.pone.0184976" target="_blank" rel="noopener noreferrer">In another study</a>, mice were fed <em>Lactobacillus</em> bacteria, commonly used as probiotic in fermented food. These microbes reduced the severity of influenza infection. The <em>Lactobacillus</em>-treated mice did not lose weight and had only mild lung damage compared with untreated mice. Similarly, others have found that treatment of mice with <em>Lactobacillus</em> protects against different <a href="https://doi.org/10.1038/srep04638" target="_blank" rel="noopener noreferrer">subtypes of</a> <a href="https://doi.org/10.1038/s41598-017-17487-8" target="_blank" rel="noopener noreferrer">influenza</a> <a href="https://doi.org/10.1371/journal.ppat.1008072" target="_blank" rel="noopener noreferrer">virus</a> and human respiratory syncytial virus – the <a href="https://doi.org/10.1038/s41598-019-39602-7" target="_blank" rel="noopener noreferrer">major cause of viral bronchiolitis and pneumonia in children</a>.</p>
Chronic Disease and Microbes<p>Patients with chronic illnesses including Type 2 diabetes, obesity and cardiovascular disease exhibit a hyperactive immune system that fails to recognize a harmless stimulus and is linked to an altered gut microbiome.</p><p>In these chronic diseases, the gut microbiome lacks bacteria that activate <a href="https://doi.org/10.1126/science.1198469" target="_blank" rel="noopener noreferrer">immune cells</a> that block the response against harmless bacteria in our guts. Such alteration of the gut microbiome is also observed in <a href="https://doi.org/10.1073/pnas.1002601107" target="_blank" rel="noopener noreferrer">babies delivered by cesarean section</a>, individuals consuming a poor <a href="https://doi.org/10.1038/nature12820" target="_blank" rel="noopener noreferrer">diet</a> and the <a href="https://doi.org/10.1038/nature11053" target="_blank" rel="noopener noreferrer">elderly</a>.</p><p>In the U.S., 117 million individuals – about half the adult population – <a href="https://health.gov/our-work/food-nutrition/2015-2020-dietary-guidelines/guidelines/" target="_blank" rel="noopener noreferrer">suffer from Type 2 diabetes, obesity, cardiovascular disease or a combination of them</a>. That suggests that half of American adults carry a faulty microbiome army.</p><p>Research in my laboratory focuses on identifying gut bacteria that are critical for creating a balanced immune system, which fights life-threatening bacterial and viral infections, while tolerating the beneficial bacteria in and on us.</p><p>Given that diet affects the diversity of bacteria in the gut, <a href="https://www.umassmed.edu/nutrition/melody-trial-info/" target="_blank" rel="noopener noreferrer">my lab studies show how diet can be used</a> as a therapy for chronic diseases. Using different foods, people can shift their gut microbiome to one that boosts a healthy immune response.</p><p>A fraction of patients infected with SARS-CoV-2, the virus that causes COVID-19 disease, develop severe complications that require hospitalization in intensive care units. What do many of those patients have in common? <a href="https://www.cdc.gov/mmwr/volumes/69/wr/mm6912e2.htm" target="_blank" rel="noopener noreferrer">Old age</a> and chronic diet-related diseases like obesity, Type 2 diabetes and cardiovascular disease.</p><p><a href="http://doi.org/10.1016/j.jada.2008.12.019" target="_blank" rel="noopener noreferrer">Black and Latinx people are disproportionately affected by obesity, Type 2 diabetes and cardiovascular disease</a>, all of which are linked to poor nutrition. Thus, it is not a coincidence that <a href="https://www.cdc.gov/mmwr/volumes/69/wr/mm6933e1.htm" target="_blank" rel="noopener noreferrer">these groups have suffered more deaths from COVID-19</a> compared with whites. This is the case not only in the U.S. but also <a href="https://www.washingtonpost.com/world/europe/blacks-in-britain-are-four-times-as-likely-to-die-of-coronavirus-as-whites-data-show/2020/05/07/2dc76710-9067-11ea-9322-a29e75effc93_story.html" target="_blank" rel="noopener noreferrer">in Britain</a>.</p>
Discovering Microbes That Predict COVID-19 Severity<p>The COVID-19 pandemic has inspired me to shift my research and explore the role of the gut microbiome in the overly aggressive immune response against SARS-CoV-2 infection.</p><p>My colleagues and I have hypothesized that critically ill SARS-CoV-2 patients with conditions like obesity, Type 2 diabetes and cardiovascular disease exhibit an altered gut microbiome that aggravates <a href="https://theconversation.com/exercise-may-help-reduce-risk-of-deadly-covid-19-complication-ards-136922" target="_blank" rel="noopener noreferrer">acute respiratory distress syndrome</a>.</p><p>Acute respiratory distress syndrome, a life-threatening lung injury, in SARS-CoV-2 patients is thought to develop from a <a href="http://doi.org/10.1016/j.cytogfr.2020.05.003" target="_blank" rel="noopener noreferrer">fatal overreaction of the immune response</a> called a <a href="https://theconversation.com/blocking-the-deadly-cytokine-storm-is-a-vital-weapon-for-treating-covid-19-137690" target="_blank" rel="noopener noreferrer">cytokine storm</a> <a href="http://doi.org/10.1016/S2213-2600(20)30216-2" target="_blank" rel="noopener noreferrer">that causes an uncontrolled flood</a> <a href="http://doi.org/10.1016/S2213-2600(20)30216-2" target="_blank" rel="noopener noreferrer">of immune cells into the lungs</a>. In these patients, their own uncontrolled inflammatory immune response, rather than the virus itself, causes the <a href="http://doi.org/10.1007/s00134-020-05991-x" target="_blank" rel="noopener noreferrer">severe lung injury and multiorgan failures</a> that lead to death.</p><p>Several studies <a href="https://doi.org/10.1016/j.trsl.2020.08.004" target="_blank" rel="noopener noreferrer">described in one recent review</a> have identified an altered gut microbiome in patients with COVID-19. However, identification of specific bacteria within the microbiome that could predict COVID-19 severity is lacking.</p><p>To address this question, my colleagues and I recruited COVID-19 hospitalized patients with severe and moderate symptoms. We collected stool and saliva samples to determine whether bacteria within the gut and oral microbiome could predict COVID-19 severity. The identification of microbiome markers that can predict the clinical outcomes of COVID-19 disease is key to help prioritize patients needing urgent treatment.</p><p><a href="https://doi.org/10.1101/2021.01.05.20249061" target="_blank" rel="noopener noreferrer">We demonstrated</a>, in a paper which has not yet been peer reviewed, that the composition of the gut microbiome is the strongest predictor of COVID-19 severity compared to patient's clinical characteristics commonly used to do so. Specifically, we identified that the presence of a bacterium in the stool – called <em>Enterococcus faecalis</em>– was a robust predictor of COVID-19 severity. Not surprisingly, <em>Enterococcus faecalis</em> has been associated with <a href="https://doi.org/10.1053/j.gastro.2011.05.035" target="_blank" rel="noopener noreferrer">chronic</a> <a href="https://doi.org/10.1016/S0002-9440(10)61172-8" target="_blank" rel="noopener noreferrer">inflammation</a>.</p><p><em>Enterococcus faecalis</em> collected from feces can be grown outside of the body in clinical laboratories. Thus, an <em>E. faecalis</em> test might be a cost-effective, rapid and relatively easy way to identify patients who are likely to require more supportive care and therapeutic interventions to improve their chances of survival.</p><p>But it is not yet clear from our research what is the contribution of the altered microbiome in the immune response to SARS-CoV-2 infection. A recent study has shown that <a href="https://doi.org/10.1101/2020.12.11.416180" target="_blank" rel="noopener noreferrer">SARS-CoV-2 infection triggers an imbalance in immune cells</a> called <a href="https://doi.org/10.1111/imr.12170" target="_blank" rel="noopener noreferrer">T regulatory cells that are critical to immune balance</a>.</p><p>Bacteria from the gut microbiome are responsible for the <a href="https://doi.org/10.7554/eLife.30916.001" target="_blank" rel="noopener noreferrer">proper activation</a> <a href="https://doi.org/10.1126/science.1198469" target="_blank" rel="noopener noreferrer">of those T-regulatory</a> <a href="https://doi.org/10.1038/nri.2016.36" target="_blank" rel="noopener noreferrer">cells</a>. Thus, researchers like me need to take repeated patient stool, saliva and blood samples over a longer time frame to learn how the altered microbiome observed in COVID-19 patients can modulate COVID-19 disease severity, perhaps by altering the development of the T-regulatory cells.</p><p>As a Latina scientist investigating interactions between diet, microbiome and immunity, I must stress the importance of better policies to improve access to healthy foods, which lead to a healthier microbiome. It is also important to design culturally sensitive dietary interventions for Black and Latinx communities. While a good-quality diet might not prevent SARS-CoV-2 infection, it can treat the underlying conditions related to its severity.</p><p><em><a href="https://theconversation.com/profiles/ana-maldonado-contreras-1152969" target="_blank">Ana Maldonado-Contreras</a> is an assistant professor of Microbiology and Physiological Systems at the University of Massachusetts Medical School.</em></p><p><em>Disclosure statement: Ana Maldonado-Contreras receives funding from The Helmsley Charitable Trust and her work has been supported by the American Gastroenterological Association. She received The Charles A. King Trust Postdoctoral Research Fellowship. She is also member of the Diversity Committee of the American Gastroenterological Association.</em></p><p><em style="">Reposted with permission from <a href="https://theconversation.com/a-healthy-microbiome-builds-a-strong-immune-system-that-could-help-defeat-covid-19-145668" target="_blank" rel="noopener noreferrer" style="">The Conversation</a>. </em></p>
By Jeff Masters, Ph.D.
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