Monthly Archives: November 2013

Environmental Impact of Professional Farms

In the past decade, many pundits and critics have talked about moving to more extensive farming in order to improve the environmental impact that food production has on the world. They say “support small, diverse farms, like grandpa used to have, so that we can protect the earth”. Or “buy organic, its more environmentally friendly”. I’ve never understood this line of thinking.

Let me put in a couple caveats……I don’t think I have the authority to tell people what to eat. Animal activists will say that we can decrease the environmental impact of egg production by eating no eggs. Duh. They don’t ever tell you how much environmental impact of whatever you replace eggs with in your diet, and I don’t have the background to even guess at those numbers. My point is, if you want to eat eggs, you can EITHER support extensive housing (free run, free-range, organic, etc), OR be environmentally friendly. No matter how many eggs we eat, the more intensive the farm, the more environmentally efficient it is, and the less environmental impact it has. Think of it this way….a hen will only lay so many eggs….if we want to impact the environment less, the more efficient the hen is, the less grain we feed her, the less water we give her to drink, and the less manure we are left to deal with….whether they are on 1 farm of 100,000 hens, 10 farms of 10,000 hens, or 1000 farms of 100 hens. If the hens are less efficient, there is more waste….at both ends.

The most environmentally friendly way of producing eggs

The most environmentally friendly way of producing eggs

I’ve wanted to write about this for a long time, but never had the numbers to back up the argument….I knew it was true, but couldn’t give you a measure of it… I can. A study released by the Egg Industry Center in the United States compares the environmental impact of a 1960’s egg farm vs a 2010 Egg farm.

Key results of the study found that compared to 1960:

The egg production process releases significantly less polluting emissions, including 71 percent lower greenhouse gas emissions.
Hens now use 32 percent less water per dozen eggs produced.
Today’s hens use a little over half the amount of feed to produce a dozen eggs.
At the same time, today’s hens produce 27 percent more eggs per day and are living longer.

Due to increased feed efficiency, advancements in hen housing and manure management, egg farms now use less water and energy on a daily basis and release less polluting emissions. Every aspect of the egg production process, from cultivating feed to raising the laying hens, has led to a reduced environmental footprint.

Producing US eggs this way will put an extra area equal to 3 PEI's under the plow.

Producing US eggs this way will put an extra area equal to 3 PEI’s under the plow.

Using 1960 technology to produce the 2010 egg supply would have required 78 million more hens, 1.3 million more acres of corn and 1.8 million more acres of soybeans.

The Province of PEI is 1.4 million acres in size. Additionally, it will take more than 2 million liters of diesel fuel to run the tractors to till the land and harvest these crops. Remember, all of this would produce the exact same number of eggs as current housing systems.

Does this mean that current egg farming practices are ideal? No. They have impacts beyond the environment, all of which have to be evaluated when deciding the right way to produce food. But, if you feel strongly about protecting the environment, and wish to have less environmental impact from the eggs (or any other food you eat), efficiency is the key….and the more intensive the farming system, the more efficient it is.

Mike the Chicken Vet