By Tara Lohan
Despite the warning signs — climate change, biodiversity loss, depleted soils and a shrinking supply of cheap energy — we continue to push along with an economy fueled by perpetual growth on a finite planet.
We'll need to reckon with this discrepancy.
Much has been written about when and how that should be done. One of the organizations looking for solutions is the nonprofit Post Carbon Institute, which for years has talked about better, instead of bigger growth, and what a transition to a less carbon-intensive energy system could look like.
Its latest effort is a report by board president Jason Bradford called The Future Is Rural: Food System Adaptations to the Great Simplification.
The report contains a premise that many may find surprising: New technologies and renewable energy will not be able to fully replace fossil fuels — or not as quickly as we will need them to. While some kinds of energy are more easily substituted by renewables, like solar and wind standing in for fossil-fueled electricity, others are not. Running heavy equipment, tractors and massive cargo ships that have relied on liquid fuels is a much more challenging task. As a result, the reasoning goes, we'll need to learn how to use less energy and use it differently.
If true this would have major impacts on every facet of our lives, including our food system —which today, in the U.S., relies on fossil fuels and long trade networks.
"We must face the prospect that many of us will need to be more responsible for food security," Bradford writes in the report. "People in highly urbanized and globally integrated countries like the U.S. will need to re-ruralize and re-localize human settlement and subsistence patterns over the coming decades to adapt to both the end of cheaply available fossil fuels and climate change."
We talked to Bradford, who has worked for years in sustainable agriculture, about what changes he thinks are ahead and what we can do to prepare for them.
You refer to the age you see coming up when there’s less cheap energy available as the “Great Simplification.” Where does that term come from and what does it mean?
The idea for this report first came from a series of guest lectures I did for a class at the University of Minnesota taught by [energy and systems expert] Nate Hagens [a Post Carbon Institute board member]. Great Simplification is the term he was using in his class, but it ties well to anthropological work looking at social complexity in relationship to energy.
Societies that have less energy available organize themselves differently, and so the Great Simplification is this idea that as energy becomes more dear we'll need to use less of it. And our highly complex and globally integrated societies will begin take on forms that are simpler over time. That means less complex trade networks, less specialization in jobs, less bureaucratic hierarchies.
When I try to envision what this Great Simplification would look like, I think of either preindustrial society or at least pre-World War II. What does it look like to you?
I remember traveling through Europe and seeing the contrast between a modern European city and someplace like a World Heritage site that is still a living city, but it was built centuries ago and there never was a suburban expansion around it. And so you basically see this countryside that you can walk to from the city center.
That's how people lived prior to the industrial revolution in most parts of the world. And if you go to somewhere such as rural Bolivia, that's what it still looks like. I think that's maybe what the long-term consequences of fossil fuel depletion will look like. But what happens in the messy middle is much harder to figure out.
To think about that, the report looks at places that have already started getting abandoned in the upper Midwest because they lost the industrial clout they used to have from the steel industry and the auto industry. So you can sort of see this process unfolding already. You may have a partial abandonment of some areas and then maybe also reclaiming of them partly for food production. Big suburban houses may instead have more people living together to share expenses and share work.
It seems like today in the United States very few people know much about farming or producing food in general. How do we start to close that knowledge gap?
I feel like we have two kinds of threads going right now. On the one hand, there are a lot of school gardens and farms taking off and there's more being done for horticulture programs, shop programs and home economics. There's a bit of a skills revival happening. But on the other hand, there's also a big focus on teaching every kid how to code, or kids being on their personal entertainment devices all the time instead of getting outside in nature.
Part of what I hope the report does is to make people aware of this skills gap and try to prioritize learning not just about self-sufficiency but how communities can work together.
I don't expect the people reading the report will suddenly perform voluntary simplicity and try to find a commune to live on somewhere. But what I do hope is to inspire people to become change agents — to be ready for when the energy system forces a transition and start setting up systems that are pre-adapted to an energy-scarce world.
What are some of the ways that people can support this kind of transition work and re-localization without being an actual farmer or food producer?
If you're a rural landowner there's a big opportunity. Farmers on average own only half the land they use. So, if you own that land, who do you choose to lease to? Are you actively trying to find a farmer who's oriented towards more regenerative, more organic, more local and regional systems?
If you have money there are also lending clubs that can help support local food systems and entrepreneurs. Then there might be people who are politically connected and know folks on the city council or in the planning department and can push for changes in codes or policies, like for instance, if there's a local law that doesn't allow you to capture rainwater or have a front yard garden.
Maybe you can support the local soil and water conservation district or the local conservation group that's trying put biodiversity back on farmlands. Farms are full of amazing habitats that can be great places to rebuild ecosystem services, protect watersheds, get insect, bat and bird populations back up — that will serve food production in the long run.
It seems like these kinds of changes that you’re talking about could seem scary to a lot of people. What are the parts that inspire you the most or you think will be most exciting about re-localization?
I think that these coming times of great challenge and stress will force people to work together in ways where they have a shared sense of purpose, [like the veterans] at the American Legion Hall who had some experience together 40 years ago when they were in their 20s that bonded them and they know deep down that this person sitting next to them is someone they can trust.
Even though it's going to be difficult, we will find tremendous meaning in our shared experience that could be wonderful. And that's something people are missing right now.
Reposted with permission from our media associate The Revelator.
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By Jacob L. Steenwyk and Antonis Rokas
From the mythical minotaur to the mule, creatures created from merging two or more distinct organisms – hybrids – have played defining roles in human history and culture. However, not all hybrids are as fantastic as the minotaur or as dependable as the mule; in fact, some of them cause human diseases.
When Looking Through a Microscope Isn’t Close Enough.<p>For the last few years, <a href="http://www.rokaslab.org/" target="_blank">our team at Vanderbilt University</a>, <a href="https://www.researchgate.net/lab/Gustavo-Goldman-Lab" target="_blank">Gustavo Goldman's team at São Paulo University in Brazil</a> and many other collaborators around the world have been collecting samples of fungi from patients infected with different species of <em>Aspergillus</em> molds. One of the species we are particularly interested in is <a href="https://doi.org/10.1006/rwgn.2001.0082" target="_blank"><em>Aspergillus nidulans</em>, a relatively common and generally harmless fungus</a>. Clinical laboratories typically identify the species of <em>Aspergillus</em> causing the infection by examining cultures of the fungi under the microscope. The problem with this approach is that very closely related species of <em>Aspergillus</em> tend to look very similar in their broad morphology or physical appearance when viewing them through a microscope.</p><p>Interested in examining the varying abilities of different <em>A. nidulans</em> strains to cause disease, we decided to analyze their total genetic content, or genomes. What we saw came as a total surprise. We had not collected <em>A. nidulans</em> but <em>Aspergillus latus</em>, a close relative of <em>A. nidulans</em> and, as we were to soon find out, <a href="https://doi.org/10.1016/j.cub.2020.04.071" target="_blank">a hybrid species that evolved through the fusion of the genomes</a> of two other <em>Aspergillus</em> species: <em>Aspergillus spinulosporus</em> and an unknown close relative of <em>Aspergillus quadrilineatus</em>. Thus, we realized not only that these patients harbored infections from an entirely different species than we thought they were, but also that this species was the first ever <em>Aspergillus</em> hybrid known to cause human infections.</p>
Several Different Fungal Hybrids Cause Human Disease.<p>Hybrid fungi that can cause infections in humans are well known to occur in several different lineages of single-celled fungi known as yeasts. Notable examples include multiple different species of <a href="https://doi.org/10.1002/yea.3242" target="_blank">yeast hybrids</a> that cause the human diseases <a href="https://rarediseases.info.nih.gov/diseases/6218/cryptococcosis" target="_blank">cryptococcosis</a> and <a href="https://www.cdc.gov/fungal/diseases/candidiasis/index.html" target="_blank">candidiasis</a>. Although pathogenic yeast hybrids are well known, our discovery that the <em>A. latus</em> pathogen is a hybrid is a first for molds that cause disease in humans.</p>
(Left) Candida yeasts live on parts of the human body. Imbalance of microbes on the body can allow these yeasts, some of which are hybrids, to grow and cause infection. (Right) Cryptococcus yeasts, including ones that are hybrids, can cause life-threatening infections in primarily immunocompromised people. Centers for Disease Control and Prevention<p><a href="https://doi.org/10.1371/journal.ppat.1008315" target="_blank">Why certain <em>Aspergillus</em> species are so deadly</a> while others are harmless remains unknown. This may in part be because <a href="https://doi.org/10.1016/j.fbr.2007.02.007" target="_blank">combinations of traits, rather than individual traits</a>, underlie organisms' ability to cause disease. So why then are hybrids frequently associated with human disease? Hybrids inherit genetic material from both parents, which may result in new combinations of traits. This may make them more similar to one parent in some of their characteristics, reflect both parents in others or may differ from both in the rest. It is precisely this mix and match of traits that hybrids have inherited from their parental species that <a href="https://www.nytimes.com/2010/09/14/science/14creatures.html" target="_blank">facilitates their evolutionary success</a>, including their ability to cause disease.</p>
The Evolutionary Origin of an Aspergillus Hybrid.<p>Multiple evolutionary paths can lead to the emergence of hybrids. One path is through mating, just as the horse and donkey mate to create a mule. Another path is through the merging or fusion of genetic material from cells of different species.</p><p>It is this second path that appears to have been taken by our fungus. <em>A. latus</em> appears to have two of almost everything compared to its parental species: twice the genome size, twice the total number of genes and so on. But unlike other hybrids, which are often sterile like the mule, we found that <em>A. latus</em> is capable of reproducing both asexually and sexually.</p><p>But how distinct were the parents of <em>A. latus</em>? By comparing the parts contributed by each parent in the <em>A. latus</em> genome, we estimate that its parents are approximately 93% genetically similar, which is about as related as we humans are with lemurs. In other words, <em>A. latus</em>, an agent of infectious disease, is the fungal equivalent of a human-lemur hybrid.</p>
How A. Latus Differs From its Parents.<p>Elucidating the identity of closely related fungal pathogens and how they differ from each other in infection-relevant characteristics is a key step toward reducing the burden of fungal disease. For example, we found that <em>A. latus</em> was three times more resistant than <em>A. nidulans</em>, the species it was originally identified as using microscopy-based methods, to one of the most common antifungal drugs, <a href="https://www.drugbank.ca/drugs/DB00520" target="_blank">caspofungin</a>. This result provides a clear example of the potential importance of accurate identification of the <em>Aspergillus</em> pathogen causing an infection.</p><p>We also examined how <em>A. latus</em> and <em>A. nidulans</em> interact with cells from our immune system. We found that immune cells were less efficient at combating <em>A. latus</em> compared to <em>A. nidulans</em>, suggesting the hybrid fungus may be trickier for our immune systems to identify and destroy.</p><p>In the midst of the COVID-19 pandemic, our quest to understand <em>Aspergillus</em> pathogens is becoming more urgent. Growing evidence suggests that <a href="https://doi.org/10.1111/myc.13096" target="_blank">a fraction of COVID-19 patients are also infected with <em>Aspergillus</em>.</a> More worrying is that these <a href="https://doi.org/10.3201/eid2607.201603" target="_blank">secondary <em>Aspergillus</em> infections</a> can worsen the clinical outcomes for those infected with the novel coronavirus. That being said, we stress that little is known about <em>Aspergillus</em> infections in COVID-19 patients due to a lack of systematic testing, and none of the infections identified so far appear to have been caused by hybrids.</p><p>So, when it comes to hybrids, some are fantastic (the minotaur), some are helpful (the mule) and some are dangerous (<em>Aspergillus latus</em>). Understanding more about the biology of <em>Aspergillus latus</em> may help in our understanding of how microbial pathogens arise and how to best prevent and combat their infections.</p>
This Saturday, June 6, marks National Trails Day, an annual celebration of the remarkable recreational, scenic and hiking trails that crisscross parks nationwide. The event, which started in 1993, honors the National Trail System and calls for volunteers to help with trail maintenance in parks across the country.
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By John Letzing
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The Navajo Nation covers the corners of three different states. Google Maps
Growing Contribution<img lazy-loadable="true" src="https://assets.rebelmouse.io/eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpbWFnZSI6Imh0dHBzOi8vYXNzZXRzLnJibC5tcy8yMzM3NDY5Ny9vcmlnaW4ucG5nIiwiZXhwaXJlc19hdCI6MTY0NjM4MTgyM30.IuQTKQs1stvYYKD6vaVTrqAyoBsUG0BhDvlhxsyKwPA/img.png?width=980" id="02a05" class="rm-shortcode" data-rm-shortcode-id="2841f82b1785df5d5ed7bf64d3bb882b" data-rm-shortcode-name="rebelmouse-image" />
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DAN medical experts explained the difference between normal lungs, on the left, and "very serious lungs caused by COVID-19," on the right. Matias Nochetto / Divers Alert Network (DAN)
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