Food System and Nutrition Fun with Coursera

Coursera is an online educational platform that partners with colleges and universities around the world to offer free courses across a wide variety of topics. I’ve taken a few classes and enjoyed them all: the lectures, quizzes, and projects have been well designed, and it’s obvious a lot of work has been put into them; and the flexibility of the weekly assignments makes it easy to fit the coursework into my schedule. I highly recommend checking out the list of courses being offered if online learning is your cup of tea.

Below are details about an upcoming course I am super excited about, and two others I have taken in the past that are relevant to Haute Pasture.


Gut Check: Exploring your Microbiome

Imagine if there were an organ in your body that weighed as much as your brain, that affected your health, your weight, and even your behavior. Wouldn’t you want to know more about it? There is such an organ — the collection of microbes in and on your body, your human microbiome.

From University of Colorado Boulder

About the Course

The human body harbors up to ten times as many microbial cells as human cells. What are these microbes and what are they doing? How can we study them to find out? What do they tell us about ourselves? Just as our human genome records traces of who we are and the conditions we have adapted to during evolutionary history, our microbial genomes may record traces of what we have eaten, where we have lived, and who we have been in contact with. The microbial ecosystems in different parts of our bodies, which differ radically from one another, also supply a wide range of functions that affect many aspects of human health.

Join us on a guided tour of the human gut and its microscopic inhabitants. We will first review what microbes are and how they get into our bodies. We will then discuss the methods we use to study microbial communities and briefly explore how gut microbiome data are analyzed. This information will provide us with a foundation to explore current microbiome research. We will cover topics such as the influence of the gut microbiota on our nutrition, health and behavior. Did you know that gut microbes may influence how sick we get or the way we feel? The course will culminate with an in-depth review of the American Gut Project, the world’s largest open-source, crowd-sourced science project, from how it works to what it’s taught us up until now.

This course starts October 6th and it should be fascinating!


The Meat We Eat

The Meat We Eat is a course designed to create a more informed consumer about the quality, safety, healthfulness and sustainability of muscle foods and address current issues in animal agriculture in developed and developing countries.

From University of Florida

About the Course

The average American is now at least three generations removed from production agriculture.  This leads to the disconnection between how the public views agriculture and how scientists and producers view it, resulting in consumer distrust of science and commercial food production.  It is this lack of trust which leads to consumer confusion and the urge to grasp at multiple solutions.  However a growing number of consumers in developed countries are aspiring to “know where their food comes from”.  Animal agriculture needs to explain the technology which will be used to sustainably feed 9 billion people by 2050.

Lectures will cover all aspects of muscle foods production, processing, preparation, cooking and storage.  Additionally, the role of muscle foods in a balanced diet will be addressed as will issues which contribute to consumers limiting or eliminating meat from their diets.

I took this course in the summer of 2014. The final project for the course was a multimedia presentation on meat cookery; mine is here.


An Introduction to the U.S. Food System: Perspectives from Public Health

Explore how food intersects with public health and the environment as it moves from field to plate.

From Johns Hopkins Bloomberg School of Public Health

About the Course

A food system encompasses the activities, people and resources involved in getting food from field to plate. Along the way, it intersects with aspects of public health, equity and the environment.  In this course, we will provide a brief introduction to the U.S. food system and how food production practices and what we choose to eat impacts the world in which we live. Through several case studies, we will discuss some key historical and political factors that have helped shape the current food system and consider alternative approaches from farm to fork. The course will be led by a team of faculty and staff from the Johns Hopkins Center for a Livable Future.  Guest lecturers will include experts from a variety of disciplines, including public health and agriculture.

I took this course in early 2013, and wrote several posts (really just bulleted lists of my notes) about the course:

Overview

Week 1: Introduction to Food Systems, Equity and the Environment

Week 2: Food Systems, Food Security and Public Health

Week 3: Public Health and Environmental Implications of Industrial Models of Food Production

Week 4: Food and Farm Policy

Week 5: Alternative Approaches to Food Production

Week 6: Diet, Food Environments, and Food Access

Coursera course “The Meat We Eat” meat cooking project

Over the past several weeks I’ve been participating in a basic overview meat sciences and technology course from the University of Florida, via Coursera, called The Meat We Eat. The course description, from Coursera, is:

The average American is now at least three generations removed from production agriculture.  This leads to the disconnection between how the public views agriculture and how scientists and producers view it, resulting in consumer distrust of science and commercial food production.  It is this lack of trust which leads to consumer confusion and the urge to grasp at multiple solutions.  However a growing number of consumers in developed countries are aspiring to “know where their food comes from”.  Animal agriculture needs to explain the technology which will be used to sustainably feed 9 billion people by 2050.

As a proponent of sourcing meat and meat products from local, sustainably run farms raising pastured, ethically treated animals rather than from massive industrial operations where output, rather than animal/environment/worker welfare and product quality, is prioritized, I thought it was important that I understand more of the details of large-scale commercial meat production. I’ll type up some lecture notes in another post; here I will discuss my final meat cookery project.

The Assignment

Document preparation of a meat recipe, discussing the details of the type and cut of meat, its packaging and appearance, storage, cookery method, sanitation, and food safety issues. I chose to cook a steak dinner, as beef is currently the only non-fish meat I am eating, and as an extra challenge, I wanted to grill the steaks. I’d never grilled steaks before, myself. (See here for another recent foray into cooking steak–I’ve only recently added steak into my pescatarian-for-over-ten-years diet.)

What I cooked

The Charlottesville, Virginia farmer’s market has several local meat vendors; I chose Wolf Creek Farm based on their wide variety of cuts of beef, and a prior positive experience. Wolf Creek breeds and raises their own cows on a pure (chemical fertilizer-free) grass diet, without antibiotics or hormones. They value environmental stewardship, healthy animals, and happy workers and community, while creating products customers will enjoy.

Wolf Creek Farm

Wolf Creek Farm’s website describes the stark contrasts between their small-scale beef production and typical industrial beef production:

“Our grass-fed, natural beef is a result of carefully selected herd genetics, that:

  • enjoys animal husbandry based upon intensive personal care and respect with no force-fed hormones and no antibiotics
  • is finished only on lush natural grass pastures with no grain or other supplements
  • is processed calmly with artisan skill in a small and clean rural abattoir with no need for irradiation and no antimicrobials
  • produces cuts that are dry-aged, safe, and nutritious

Contrast this with the beef produced by the industrial beef conglomerates who control 98% of the US beef production, where:

  • animal husbandry consists of force-fed hormones and constant antibiotics in a mechanized process
  • finishing is accomplished in confinement feed-lots by feeding grain that is produced under significant chemical fertilizer, pesticide and herbicide loads, combined with feed supplements containing antibiotics such as Rumensin to inhibit rumen gas build-up and bloat from the grain and Tylosin to reduce liver infections caused by bacteria from pH imbalanced rumens, ionophores, synthetic estrogens to promote growth such as Revlar which are banned in Europe, liquefied fat, and other protein supplements
  • processing is accomplished in an industrial slaughter-house with minimum wage labor on a disassembly-line where the emphasis is on speeds reaching over 400 animals per hour and requires irradiation and hot steam chamber antimicrobials at the end of the line to ensure the meat is “safe”
  • cutting these tens of thousands of wet-aged carcasses produces co-mingled meat containing high levels of saturated fats”

Beef prices by cut

Not being very steak-savvy, I asked the purveyor to recommend a steak for grilling. His immediate response was “rib steak.”

Beef retail cuts

How is a rib steak different from the better known ribeye steak? They’re basically the same, but the rib steak is bone-in while the ribeye is not. Rib cuts are harvested from the rib primal, which covers the upper rib cage. A rib steak is comprised of three major muscles, Longissimus Dorsi, Spinalis Dorsi & Multifidus Dorsi, and as this area of the cow is not used for locomotion or weight-bearing, the meat is naturally tender and marbled with fat.

Rib cuts

The meat is butchered at the farm’s abattoir, hung in cool storage for 21-28 days to dry age–wherein natural enzymes tenderize and flavor the meat–and then vacuum sealed and flash frozen. The steaks at the market were stored frozen in clean coolers. I chose two steaks: one was 0.98lb, for $16.57, and the other was 0.82 lb, for $13.87. Rib steaks are $16.50/lb plus tax.

Frozen steaks

In addition to the two steaks, I picked up some shiitake and oyster mushrooms (1/4 lb for $4), and an avocado ($2), and two tomatoes ($1.50) to go with some cucumbers from a friend’s yard.

How I cooked it

My initial plan, based on the meat purveyor’s suggestion, was to sear the steaks over high heat on the grill for 10-15 seconds a side, and then let them cook a couple minutes per side over 250-300 degree heat. But then a friend told Trusty Sous Chef Mr HP and I about reverse searing and we were intrigued.

‘A small but vocal population of steak lovers swears by the “reverse sear” technique. The theory behind this method is that cooking the steak in the oven first will dry the outside of the steak while slowly cooking the inside and keeping it tender. If the outside of the steak is dry, it will then sear faster and more efficiently in a hot pan.’ — from Mark’s Daily Apple

The new plan: start the steaks in a 275 degree oven until they reach 100-110 degrees, and then move them to a hot grill to sear the outsides.

Step 1: Thaw the steaks.

In the fridge, overnight. Our fridge is around 38 degrees.

Thawed steaks

Step 2: Unwrap the steaks and pat them dry. Then wash hands.

Pat the steaks dry

Step 3: Salt and pepper both sides of the meat.

Salt and pepper the steaks

Step 4: Preheat oven to 275 degrees. Preheat the grill to high. When the oven is ready, load in the steaks on a rack to facilitate air circulation around the meat.

Steaks go in the oven first

(Meanwhile, chop cukes, tomatoes, and avocado. Mix in a large bowl with a bit of olive oil and balsamic or wine vinegar.)

Chop the veggies

(Then chop up the mushrooms, keeping the shiitakes separate from the oysters, as cooking times differ. Heat a dry skillet to medium, add the shiitakes first, and then the more delicate oysters a couple minutes later. When the mushrooms are almost cooked, add some butter to the pan for a boost of flavor.)

Mixed mushrooms

Step 5: When the steaks reach 100-110 degrees (not the 87 pictured below), remove them from the oven onto a clean plate.

Checking temperature in oven

I found that when the steaks hit the target temperature, they took on a grayish color (see image below), which I will use next time as an indicator that it’s time to check temp, rather than the paranoid stabbing of the steaks every couple minutes that I employed here.

Steaks out of the oven

Step 6: Drop the steaks on the hot hot grill to sear for 2 minutes each side.

Grilling the steaks

Check the degree of doneness using a meat thermometer. As we learned in class, palatability is maximized at 145 degrees, which is right between rare (140 degrees) and medium rare (150 degrees). My steak, being smaller than Mr HP’s, would be a little more cooked, but that was ok with me as I’m just getting back into the eating steak swing of things.

Checking temperature of steak

Step 7: Move the steaks to a clean plate and cover loosely with foil for ten minutes, to let the juices reabsorb into the meat.

The picture of that wasn’t interesting so I am sparing you.

Step 8: Serve and enjoy!

Dinner is ready

Cooked rib steak

Storing Leftovers

The steak was fantastic, and the only “leftovers” were fatty bits and the bone from each steak; luckily we knew a certain dog who would be very interested in helping take care of those. The gristly pieces went into a sealed container in the fridge to be portioned out over the next few meals, but he got to enjoy a bone right away.

Steak leftovers

Leftover rib steak bone

Leftover rib steak bone

Summary

This experiment was a great success. The quality of the steak, the ease and results of the reverse-sear cooking method, and the simple but complementary sides (which were completely local except for the avocado, so that’s a potential place for improvement) all exceeded our expectations.

Estimated costs

Steak 1: $16.57

Steak 2: $13.87

Mushrooms: $4

Cucumbers: free

Tomatoes: $1.50

Avocado: $2

Total meal cost: $37.94

Total meat cost: $30.44

Meat’s percentage of total cost: 80%

An Introduction to the US Food System, Week 1: Introduction to Food Systems, Equity and the Environment

“If you eat, you’re involved in agriculture.” – Wendell Berry

Here are my notes from week 1 of the free course I’m taking from Johns Hopkins on the US food system. So far I’m really enjoying it! These notes aren’t proofed or reorganized, just dumped here from Evernote for your educational pleasure. I hope you learn something; I know I did, and will be expanding upon some of these points in later posts.

The Vicious Spiral

Poverty – Population growth – Environmental degradation (PPE spiral)
  • Extreme poverty in the world is decreasing
  • Projected population growth mostly in developing nations
    • high: sub-saharan africa, bolivia, afghanistan, pakistan
    • Low: canada, brazil, most of europe, russia
  • Hunger declining but still too high
    • Most in Asia/Pacific,then sub-Saharan Africa
    • 1 billion of 7 billion total people are undernourished
    • Food prices spikes due to fuel prices going up, more crops used for ethanol

Equity and Global Ecological Footprints

Global pop: 7bil as of 10/11
  • 2bil overweight or obese
  • 1bil undernourished

Resource extraction increasing in emerging economies; 75% of pop live in countries where resource extraction > resource capital

Water quality/quantity:

  • Extreme scarcity in sub-Saharan, India, Nepal, SE Asia, Lat Am highlands
  • Chemical pollution bad in US, China
  • Dead zones from excess fertilizer: poultry production belt (NC, deep south), Europe’s concentrated livestock farming
Degradation of soil:
  • US farm belt (MS valley) very degraded
  • Iowa, for ex, loses soil at unsustainable rate–some areas >100T of soil per acre. Rich, fertile topsoil being lost to industrial farming techniques/overcultivation
    • Soil carried down MS river and lost at sea

Biodiversity:

  • Same area of soil degradation in N Amer shows high loss of biodiversity
    • Focus on corn, soybeans
  • Sub saharan, latin america bad
  • Industrialized countries w/ 15% pop used 50% fossil fuel, mineral resources; developing countries increased fossil fuel use by 40% in last 10 years
Biocapacity: capacity of ecosystems to produce useful biological materials and absorb human-generated CO2

Biologically productive land: cropland, grazing land, forest, fishing ground. Declining

Most of world at margins of using more biocapacity than is being replenished. In 2007: 151% Earth’s biocapacity used. Some countries ok: Lat Am, Canada, Russia

Diet, Food Production, and Global Health

Double burden of disease: healthcare systems of low/middle income countries overwhelmed by same old communicable diseases plus new chronic diseases from diet/less activity. Obesity has doubled globally since 1980. Diabetes type 2, cancers, heart disease, stroke. 80% of type 2 diabetes is in developing countries.

Undernourished mostly in sub-Saharan Africa, India, Mongolia, even China.

Food distribution:

  • US produces and uses vast majority of corn
  • Europe most wheat
  • US/Europe most meat, dairy, way more than India/China
  • US consumes 800kg grain per capita per year. Compare to 400 Italy, 200 China. Most of our grain goes to feeding livestock.
    • 700kg grain = 100kg beef
    • 650kg grain = 100kg pork
    • 260kg grain = 100kg poultry
    • 1000kg water = 1kg grain! So 700,000 kg water = 100kg beef; 7000kg water = 1kg beef

Federal subsidies: meat and dairy 73.8% of all subsidies. Fruit and veg .37% 

US meat consumption since 1961 increased 70%. 223lbs per person per year. Global demand for meat should double from 1990-2020. Global consumption since 1961: 82% increase. FDA says we don’t need all that protein and meat. US men consuming 170% of recommended protein; women 127%. Lot of room to reduce consumption.

Intergenerational equity and Food production impacts

  • Rapid land and soil degradation
  • Water table lowering
  • Antibiotic overuse – drug resistant bacteria
  • Fish stock depletion and more factory farmed fish
  • Loss of biodiversity
  • Climate disruption
Industrialized agriculture: started in 19th C for efficiency, speed. Monocropping, pesticides, fertilizer, water.
  • Fertilizer overuse = nitrogen/phosphorus pollution
  • High use of non-renewable resources and reliance on fossil fuels
  • Agricultural subsidies
  • Artificially inexpensive fuel and water
  • Hidden costs of food = externalities
Production needs quality soil and good rainfall but that’s unevenly distributed.
  • 2/3 water use worldwide is for irrigation
  • Irrigated land produces most crops, and amount of irrigated land growing

Chemicals

  • 220million metric tons of fertilizer used per year globally in 2020
    • Most chemicals not tested
    • Crops only absorb 1/3 to 1/2 of applied nitrogen
  • 6mil metric tons of pesticides used per year globally
    • chemicals enter food, air, water stream and could give us cancer
    • 1 billion lbs pesticide per year in US
      • that’s 20% global production for 4% global population
    • Roundup resistance (glycophosphate). At least 10 species of weeds now.
      • Monsanto controls 96% soybean market w/ Roundup resistant soybean seeds

Energy use

  • 1kcal output requires 3kcal input on avg farm
  • Feedlot cattle: 1kcal output requires 35kcal input!
  • Over 80% US energy consumption for food production (2002)
  • Most greenhouse gases from meat (30%); processed foods/snacks (25%); dairy (18%); cereals & fruit/veg 11%; chicken/eggs/fish 10%

Industrial agriculture and biodiversity

  • Current rate of loss 1000 species a year!
  • vs Paleolithic rate of 1-2 per year
  • Amazon, 2000-2005, deforestation: 60% for cattle farming, 33% small-scale agriculture, 1% large-scale agriculture
    • 1% has ballooned in recent years due to soy production
    • Also sugar cane, maize production
    • Soybeans here predominantly shipped to China to feed hogs, essentially shipping water to china in the form of soybeans
  • Threat to food supply: monocropping = more susceptible to disease, drought, pests
    • Industrial animal farming = loss of genetic biodiversity in livestock
    • Species go extinct
    • Spread of pathogens (west nile, dengue)
    • New pathogens emerge
    • Balance of species controls pests (why crop rotation is used)

The role of food animal production

1/32 of the Earth’s surface suitable for raising food. Must raise food for 7bil people.

Meat production inefficient use of grain, water, land, but accounts for 70% farmland, 30% Earth’s surface, 40% grain grown globally

  • 7% global water for grain for livestock
  • 70% herbicide and 37% pesticide in agriculture used for livestock feed
  • half corn grown in US used for animal feed (1% for human feed as actual corn)
  • Grain use ahead of production; global stocks decline (China became a grain importer) (450mil hogs grown and consumed each year in china)
  • Africa and Middle East require more grain
  • Ethanol production the major threat to availability of grains for human consumption since late 2005 (largely driven by subsidies)

Industrial food animal production:

  • one corp controls everything from hatching to slaughter.
  • animals raised in CAFOs
  • feed controlled by corp, not contract grower
  • grower is left with waste and carcasses, paid at end of cycle by weight of animals
  • livestock outnumber humans 5:1 in US
    • 2002 10bil animals slaughtered for food in US
    • 93% chickens worldwide
    • 20% of worlds animals consumed in US
    • 5 tons waste per capita
  • CAFO vs public health
    • antibiotics = resistant bacteria
    • emergence of new foodborne pathogens
    • chemicals enter foodchain through diets of animals
    • CAFO ruins communities
    • health threats apparent in CAFO neighbors, workers (asthma, injuries)
    • climate change
      • 18% greenhouse gas production worldwide, more than anything incl transportation
      • 37% methane emissions (20x worse than CO2)
      • 65% NO2 emissions (286x worse than CO2, and lasts 114yrs in atm). FERTILIZERS.
  • Precautionary principle: if something is suspected of endangering humans, the proponent of the activity, not the public, should bear burden of proof
  • How to feed everyone sustainably?
    • small farms currently support 2bil people globally; improve biodiversity and soil quality; decrease poverty
    • need to advance technologies and make them free
    • govt investment
    • invest in women farmers
    • infrastructure improvements: roads, storage facilities, refrigeration, surplus mgmt
    • diet: can’t sustain meat consumption increase, but need access to iron- and protein-rich meat sources
    • resilient food system: elasticity, recoverability, buoyancy

 Reading: Food: The growing problem

http://www.nature.com/news/2010/100728/full/466546a.html

  • At least 30% of global food is wasted; people are too poor to buy it. Highest rates of hunger in Sub-Saharan Africa; most undernourished in Asia
  • Percent hungry dropped for decades, but 2008 food price crisis reversed trend
  • Available calories per person has increased (family size decreasing, pop growth should plateau in 2050), so we will be able to support higher pop, but water is limiting resource
  • Some studies say we’ll have enough land by converting land farmland in Lat Am and Afr without hurting forests, protected areas, urbanization. But others say we should intensify existing farms
  • Sustainable intensification: doing more with less, improving techniques, less water, less chemicals. Need more public investment in farming practices.

Alice Waters came to Charlottesville

Alice Waters visited a school in Charlottesville last week. Beyond the Flavor has a beautiful post from the event. The City Schoolyard Garden Facebook page has several more pictures.

Who: Alice Waters, celebrated chef and owner of Chez Panisse, a Berkeley, CA restaurant consistently ranked among the world’s best. She is an author, and an activist for local, organic food; school lunch reform; and related education and outreach efforts.

What: Ms. Waters visited the City Schoolyard Garden at Buford Middle School, which is inspired by the Edible Schoolyard Project, which was created by Waters, and parents and staff from Martin Luther King, Jr. Middle School in Berkeley.

When: April 18th, a dreary, rainy day.

Where: The City Schoolyard Garden at Buford Middle School, where students get hands-on learning about gardening, cooking, nutrition, and science.

Why: Ms. Waters came to Charlottesville to speak about the importance of schoolyard gardens and show her support for the City Schoolyard Garden at Buford. From a description of Chez Panisse Foundation’s mission:

Using food systems as a unifying concept, students learn how to grow, harvest, and prepare nutritious seasonal produce. Experiences in the kitchen and garden foster a better understanding of how the natural world sustains us, and promote the environmental and social well being of our school community.

 

There’s a farm in London?

Today, Haute Pasture went on a field trip to Hackney City Farm, which is actually located within the city of London. From their About page:

For over 20 years, Hackney City Farm has been giving the local community the opportunity to experience farming right in the heart of the city.

It offers an opportunity for children and adults to get up close to a range of farmyard animals and to learn about where their food comes from and why that matters.

Britons seem to be much more concerned with the source of their food than Americans, and maybe programs like Hackney City Farm have a lot to do with that. It’s important to remind people that animal products come from animals, and not machines. The disgusting people involved in the recently-exposed abuse at the Iowa pig factory apparently never learned that lesson.

Some pictures from the quaint little urban farm:

hackney city farm

 

hackney sheep

hackney chickens

hackney duck

hackney poultry