Feedlot cows produce more methane than pasture cows

As more researchers work to understand where ghg emissions occur in ag practices, we can begin to parse growing practices to determine which have a lower carbon footprint.

Environmental Health Perspectives posted recent research, Global Farm Animal Production and Global Warming: Impacting and Mitigating Climate Change, that does some of this parsing by combining the results of various related studies.

Here are some emerging facts from that article:

1. "Animal agriculture sector accounts for approximately 9% of total CO2 emissions, which are primarily the result of fertilizer production for feed crops, on-farm energy expenditures, feed transport, animal product processing and transport, and land use changes (Steinfeld et al. 2006)."
2. "Burning fossil fuels to produce fertilizers for feed crops may emit 41 million metric tons of CO2 per year (Steinfeld et al. 2006)."
3. " Farm animals and animal production facilities cover one-third of the planet's land surface, using more than two-thirds of all available agricultural land including the land used to grow feed crops (Haan et al. 1997). "
4. "Typically, cattle confined in feedlots or in intensive confinement dairy operations are fed an unnatural diet of concentrated high-protein feed consisting of corn and soybeans. Although cattle may gain weight rapidly when fed this diet (Pollan 2002), it can cause a range of illnesses (Smith 1998). This diet may also lead to increased methane emissions."
5. And this: "The standard diet fed to beef cattle confined in feedlots contributes to manure with a "high methane producing capacity" (U.S. EPA 1998). In contrast, cattle raised on pasture, eating a more natural, low-energy diet composed of grasses and other forages, produce manure with about half of the potential to generate methane (U.S. EPA 1998)."
   

So feedlot cattle appear to produce twice the methane as pasture due to the diet. I assume this does not include the any methane from fertilizer or feed growing practices.

The first response seems obvious: eat less meat. The counterpoint is that we need protein. We can of course grow more pasture beef, but at current consumption habits we would have to expand land use for cattle quite significantly if we consume meat at current levels. Also, as health efforts (partially) succeed in getting us to reduce our red meat consumption in this country, as economic progress grows in developing nations, particularly China and India, meat consumption increases potentially negating any ghg reduction we have accomplished.

Ugh. So what can we do?

Since the climate is a global issue the pathway forward needs to incorporate global, national, and local concerns:

1. Reduce feedlot cattle consumption everywhere.
2. Increase the production of pasture beef.
   
1. Which also decentralizes manure production and reduces the necessity of using fossil fuels to create fertilizers, and then transport them to buyers.
   
3. Generate large consumer awareness programs in developing nations that as they turn their diets towards more red meat consumption that they request pasture beef.
1. Other research shows that pasture beef has more omega 3 fatty acids than feedlot beef (will get source).
   
4. Encourage trade policies that incentivize the production of low carbon meat.
   

Secondary source (primary sources in brackets, available in article): Koneswaran G and Nierenberg D, Global Farm Animal Production and Global Warming: Impacting and Mitigating Climate Change, Environmental Health Perspectives Volume 116, Number 5, May 2008, www.ehponline.org/docs/2008/11034/abstract.html

Ethanol and E Coli

New reports are emerging around a concern that the increase in ethanol production is fueling an increase in E. coli contamination. The connection is distiller's grain, a byproduct of ethanol production, that is becoming a cheap source of food for cattle.

As reported in the Des Moines Register on Jan 27, 2008: "Studies at two universities suggest that feeding cattle a byproduct of ethanol production known as distillers grains may increase levels of a deadly form of E. coli bacteria.

"Concerned about those findings, U.S. Department of Agriculture scientists have recently put 300 cattle on a diet of distillers grains and are testing them regularly for the bacteria. Results won't be known until later this year."1

The article continues to say that "Researchers at Kansas State University noticed the possible E. coli connection to distillers grains in 2005. A second study found a twofold increase in E. coli levels in cattle fed the product compared with those that ate only corn. Research at the University of Nebraska showed mixed results. Cattle fed a diet comprising 10 percent to 30 percent distillers grains actually had lower rates of E. coli than cattle on a diet of all corn. But cattle fed 40 percent to 50 percent distillers grains showed higher E. coli rates.

"That would suggest that there was something about these distillers grains diets that influenced the ability of these cattle to shed E. coli," said David Smith, one of the scientists who worked on the Nebraska research."2

Richard Raymond, the U.S. Department of Agriculture's undersecretary for food safety, was referenced as saying "the government had no intention of restricting the use of distillers grains even if the E. coli link is confirmed, and would instead leave it to the industry to decide how to address the issue. One possibility, he said, is to vaccinate cattle."3

This is an ironic twist to progressive policy solutions and shows that we are indeed in a new world needing new solutions for new problems. By increasing biofuels we are increasing the economics of 'factory farms'. "Closing the loop", or turning a waste in to a product, has meant that in ethanol production wet grain mash is being reused as a feed supply for cattle, thereby lowering the production costs of cattle and increasing the economic returns of Confined Animal Feeding Operations (CAFOs, a.k.a factory farms). As well, a wet grain is more energy efficient since you do not use additional energy to dry the grain after ethanol production, which means the net energy balance of corn based ethanol is better with wet distillers grain than dried grain.

As well, recent federal legislation encourages the expansion of ethanol production. This will mean an increase in distiller's grain. Will it mean an increase in E. coli as well?

Makes the stomach turn just thinking about it.

Sources:
1) Philip Brasher, "Scientists study possible link between ethanol byproduct and E. coli", Des Moines Register, January 27, 2008, http://www.desmoinesregister.com/apps/pbcs.dll/article?AID=/20080127/NEWS/801270330
2) Ibid.
3) A quote from same article, not exact quote from Raymond.

Esimating Size of Food Servings

The USDA's Nutrient Data Laboratory has created a table call Tips for Estimating Amount of Food Consumed in their publication "Nutritive Value of Foods"

" This table lists some handy tips to help you estimate the amount of food you eat when you cannot measure or weigh it."

Here is the table data:

Breads and grains
1⁄2 cup cooked cereal, pasta, rice: volume of cupcake wrapper or half a baseball
4-oz bagel (large): diameter of a compact disc (CD) medium piece of cornbread medium bar of soap

Fruits and vegetables
medium apple, orange, peach: tennis ball
1⁄4 cup dried fruit: golf ball or scant handful for average adult
1⁄2 cup fruit or vegetable: half a baseball
1 cup broccoli: light bulb
medium potato: computer mouse
1 cup raw leafy greens: baseball or fist of average adult
1⁄2 cup: 6 asparagus spears, 7 or 8 baby carrots or carrot sticks, or a medium ear of corn

Meat, fish, and poultry, cooked
1 oz: about 3 tbsp meat or poultry
2 oz: small chicken drumstick or thigh
3 oz: average deck of cards, palm of average adult’s hand, half of a whole, small chicken breast, medium pork chop

Cheese
1 oz hard cheese: average person’s thumb, 2 dominoes, 4 dice

Other
2 tbsp peanut butter: Ping-Pong ball
1⁄3 cup nuts: level handful for average adult
1⁄2 cup: half a baseball or base of computer mouse
1 cup: tennis ball or fist of average adult

Source: Susan E. Gebhardt and Robin G. Thomas, "Nutritive Value of Foods", USDA Agricultural Research Service, Home and Garden Bulletin, Number 72, rev. October 2002

Top 20 Healthiest Foods

So what are top 20 healthiest foods? I thought this would be easy research, but like most anything, the answer is: it depends. What are you measuring for: antioxidants? Vitamins? Proteins? By season? By cultural acceptance? These and other variables/parameters will control the outcome of any list making efforts.

However, there are some that appear on more lists than others.

I dove in by doing a Google search on "Top 20 healthiest foods". I selected lists from the first two Google hit pages, choosing what appeared to be the top 4 lists, alphabetized them, and then looked to see which foods appeared on the most lists. I am sure I have a subjective lens, so please chew on this and let me know if there are some additions or changes you may suggest.

Apples
Apricots
Avocados
Blueberries
Broccoli
Dried Beans (lentils, kidney, pinto, red, soy)
Fatty (oily) fish
Herbs, spices
Garlic
Low fat dairy
Nuts and Seeds
Olive Oil
Onions
Potatoes
Raspberries
Peas
Shellfish
Spinach
Tomatoes
Whole grains, wheat (wheat germ, oat, whole wheat)

So what is the conclusion? A diet rich in simple, varied whole foods is the best thing for the body. This does not have to mean expensive. This searching came across a wonderful website called The Hillbilly Housewife shows with recipes and tips on convenient foods that are usually good buys.

Other sources for nutrition info for various foods:

• Fruit and Vegetable Nutrition Facts Chart (Dole 5 A Day website)
• USDA National Nutrient Database
• USDA Food and Nutrition Information Center

Study: Farmers market food costs less

An article in the Seattle Times today discussed research done by a Seattle University economics class that compared the cost for farmer market food with nearby markets. The results go against the perception. From the article:
"The farmers market was slightly less expensive pound for pound, on average, for 15 items that included Fuji apples, red potatoes, baby carrots, spinach and salad mix."

Full article is available at the Seattle Times, entitled "Farmers-market food costs less, class finds".

Change in Added Sugar Consumption

Here are some graphs I made from the servings.xls spreadsheet at the USDA Economic Research Service website that show the growth of per capita (per person) consumption of added sugars between 1970 and 2004.

Notes:
(1) Total added sugars includes all corn derived sweeteners plus edible syrups and honey, which showed up on the graph near zero so I did not include them.
(2) All corn sweeteners include High Fructose Corn Syrup, Glucose, Dextrose, and Corn Sweeteners.


Source for both: USDA/Economic Research Service 2006 data, http://www.ers.usda.gov/Data/FoodConsumption/

The Growth of Obesity Across the Country

We have been hearing that obesity is an epidemic across the nation. But what does an epidemic really look like?

The Center for Disease Control's web page Overweight and Obesity: Obesity Trends: U.S. Obesity Trends 1985–2005 includes a powerful powerpoint presentation (or pdf) that illustrates the growth of Body Mass Index (BMI) across time.

For a quick snapshot, here are a couple of images that show what an epidemic looks like. Notice how in the year 2000 they added a new higher category, and in 2005 they added two more.


Source: "Overweight and Obesity: Obesity Trends: U.S. Obesity Trends 1985–2005", U.S. Dept of Health and uman Services, Center for Disease Control, http://www.cdc.gov/nccdphp/dnpa/obesity/trend/maps/index.htm; viewed March 10, 2007

How to Replace Vending Machine Fundraising

So got to thinking:

• In 2005 WA state had 1,013,189 enrolled in public school (OSPI report card).
• According to IATP's report on vending machine fundraising (see post), " School beverage contracts generate an average of $18 per student per year for schools and/or school districts."
• Therefore, to get rid of the temptation to make money by selling our kid's soda pop at school is to increase the state education budget by roughly $18 million.
  
• Could it really be that easy? Doubt it, but it's a doable number to propose.
  

Health Costs on the Federal Budget

Most of us have probably heard that obesity is a problem and raising the cost of healthcare in the U.S. Here is a chart from the USDA's Economic Research Service (2003) showing the growth of health costs as a percentage of the federal budget.

Source: USDA Economic Research Service, " FoodReview: Weighing In on Obesity," Vol. 25, No. 3

Healthy vending machines can mean more money

According to USDA and the Centers for Disease Control and Prevention (CDC), “students will buy and consume healthful foods and beverages – and schools can make money from selling healthful options.” Their survey of 17 schools and school districts found that, after improving school foods, 12 schools and districts increased revenue and four reported no change.

Source: Food and Nutrition Service, U.S. Department of Agriculture; Centers for Disease Control and Prevention, U.S. Department of Health and Human Services; and U.S. Department of Education. FNS-374, " Making it Happen! School Nutrition Success Stories," Alexandria, VA, January 2005.

Media and Obesity

The Kaiser Family Foundation released a report in 2004, The Role of Media in Childhood Obesity, that brings together research from a variety of disciplines for the first time in a document that looks exclusively at the role of media in contributing to and potentially helping to reduce rates of childhood obesity.

From the press release:
The typical child sees about 40,000 ads a year on TV, and that the majority of ads targeted to kids are for candy, cereal, soda and fast food... Exposure to food advertising affects children’s food choices and requests for products in the supermarket.

The report also highlights ways media can play a positive role in helping to reduce childhood obesity, through programs that encourage children to be active and help teach good nutrition, through public education campaigns aimed at children and parents, and by using popular media characters to promote healthier food options to children.

Source: Kaiser Family Foundation, The Role of Media in Childhood Obesity, Feb. 2004

The taxing burden of obesity

Ann Cooper wrote a paper for the Food and Society Policy Fellows with this quote (and source):

"It costs approximately $6,000 to feed a child lunch during the entire tenure of their K-12 education, and it costs our health care system and our taxes approximately $175,000 per adult, for illnesses related to poor childhood nutrition."

Sources: “National School Lunch Program,” USDA: Child Nutrition Webpage: FNS Online, February 2002; “Nutrition and the Health of Young People: Fact Sheet,” USDA:CDC, June 1997.

More obesity facts

Quotes (and original sources) from the Center for Science in the Public Interest's Improve School Foods program:

• " According to the USDA, healthier diets could prevent at least $71 billion per year in medical costs, lost productivity, and lost lives."
• Source: Frazao E. "High Costs of Poor Eating Patterns in the United States." In America's Eating Habits: Changes and Consequences. Edited by Elizabeth Frazao. Washington, D.C.: Economic Research Service, U.S. Department of Agriculture, 1999. Agriculture Information Bulletin No. 750, pp. 5-32.
• " U.S. health-care costs due to obesity are $94 billion a year, half of which ($47 billion) is paid through Medicare and Medicaid."
• Source: Finkelstein EA, Fiebelkorn IC, Wang G. “State-level Estimates of Annual Medical Expenditures Attributable to Obesity.” Obesity Research 2004; 12:18-24.
• " From 1979 to 1999, annual hospital costs for treating obesity-related diseases in children rose three-fold (from $35 million to $127 million)."
• Source: Wang G, Dietz W. "Economic Burden of Obesity in Youths Aged 6 to 17 Years: 1979-1999." Pediatrics 2002, vol. 109, pp. e81.

Do you know how our diet has changed?

The USDA Factbook for 2001/02 (the latest year for figures) has this to say about the changing American diet:

• In 2000, Americans consumed an average 57 pounds more meat than they did annually in the 1950s, and a third fewer eggs.
• Americans are drinking less milk and eating more cheese.
• The average consumption of added fats increased by two-thirds between 1950-59 and 2000.
• The per capita consumption of fruit and vegetables increased by one-fifth between 1970–79 and 2000.
• Consumers eat too much refined grain and too little whole grain, while the annual average grain consumption was 45 percent higher in 2000 than in the 1970s.
• America’s sweet tooth increased 39 percent between 1950–59 and 2000 as use of corn sweeteners octupled.

Source: USDA, "Agriculture Factbook 2001-2002," chapter 2, http://www.usda.gov/factbook/chapter2.htm.

The Cost of Obesity

A recent National Academy of Sciences report, "Preventing Childhood Obesity: Health in the Balance", described how the best way to fight the increasing obesity youth epidemic is to reform a number of separate yet interrelated social sectors. From the report’s Sept. 30, 2004 press release:

"We must act now and we must do this as a nation," said Jeffrey Koplan, vice president for academic health affairs, Emory University, Atlanta, and former director of the Centers for Disease Control and Prevention. Koplan chaired the committee of 19 experts in child health, nutrition, fitness, and public health who developed the report in response to a request from Congress for an obesity prevention plan based on sound science and the most promising approaches.

"Obesity may be a personal issue, but at the same time, families, communities, and corporations all are adversely affected by obesity and all bear responsibility for changing social norms to better promote healthier lifestyles," Koplan added. "We recognize that several of our recommendations challenge entrenched aspects of American life and business, but if we are not willing to make some fundamental shifts in our attitudes and actions, obesity's toll on our nation's health and well-being will only worsen.

“ Among specific steps recommended by the report is a call for schools to implement nutritional standards for all foods and beverages served on school grounds, including those from vending machines.”

The Insitute of Medicine's Prevention of Obesity in Children and Youth program website continues to show the costs that society carries for such issues by showing that “Obesity-associated annual hospital costs for children and youth more than tripled over two decades, rising from $35 million in 1979-1981 to $127 million in 1997-1999. After adjusting for inflation and converting to 2004 dollars, the national healthcare expenditures related to obesity and overweight in adults alone range from $98 billion to $129 billion annually.”

Obesity and diabetes discussion are dominating most health discussions these days, including a cover story by Time and expanded coverage around a TIME/ABC News Summit on Obesity. The executive summary mentions items the attendess disagreed on as well as these items of agreement: “The challenge is to shift from an economy and eating habits that are quantity-driven to ones that are quality-driven… Our economy and longstanding government policies are based on providing plentiful, cheap — and often low-quality food. That needs to change.”


At the summit, U.S. Surgeon General Richard Carmona said

" As we look to the future and where childhood obesity will be in 20 years... it is every bit as threatening to us as is the terrorist threat we face today. It is the threat from within."

Together these facts and concerns show the realities of how some of our current ag, nutrition, and education policies are affecting our children’s health, and our public health system financially. The calls for needing social norm-busting approaches is clear, and a new approach that impacts what we feed our children has been mentioned from those within our federal government. Since changing what people feed their children at home is extremely difficult and brings in to play invasion of privacy arguments, we can collectively utilize our public funds to address these issues.