Featured Research

from universities, journals, and other organizations

How to curb discharge of the most potent greenhouse gas: 50-percent reduction in meat consumption and emissions

Date:
April 13, 2012
Source:
Woods Hole Research Center
Summary:
A new study found that meat consumption in the developed world would need to be cut by 50 percent per person by 2050, and emissions in all sectors -- industrial and agricultural -- would need to be reduced by 50 percent if we are to meet the most aggressive strategy set by the Intergovernmental Panel on Climate Change (IPCC), to reduce the most potent of greenhouse gases, nitrous oxide (N2O).

Cleaning out manure. The nitrogen contained in fertilizers and manure is broken down by microbes that live in the soil and released into the atmosphere as N2O.
Credit: © corepics / Fotolia

Meat consumption in the developed world needs to be cut by 50 percent per person by 2050, and emissions in all sectors -- industrial and agricultural -- need to be reduced by 50 percent if we are to meet the most aggressive strategy, set out by the Intergovernmental Panel on Climate Change (IPCC), to reduce the most potent of greenhouse gases, nitrous oxide (N2O).

The findings are results of a study by Dr. Eric Davidson and are published April 13 in IOP Publishing's Environmental Research Letters. Dr. Davidson, who is President and a Senior Scientist at the Woods Hold Research Center in Massachusetts, demonstrates the magnitude of changes needed to stabilize N2O concentrations in the atmosphere.

N2O is the third highest contributor to climate change behind carbon dioxide (CO2) and methane (CH4); however, it poses a greater challenge for mitigation since nitrogen is an essential element for food production. It is also the most potent of these three greenhouse gases, as it is a much better absorber of infrared radiation. But total anthropogenic emissions are about 6 million metric tons of nitrogen as N2O, compared to 10 billion metric tons of carbon as CO2.

The main sources of N2O in the atmosphere are due to the spreading of synthetic nitrogen fertilizers onto agricultural soils and the use and storage of livestock manure. The nitrogen contained in fertilizers and manure is broken down by microbes that live in the soil and released into the atmosphere as N2O. In order to reduce emissions, it will be necessary to apply certain changes to the food production process.

Dr. Davidson believes that this can be achieved through improved management of fertilizer and manure sources, as well as through reduction of the developed world's per capita meat consumption that will relieve pressure on fertilizer demand and reduce growth in the amount of manure being produced. "We have the technical know-how and the tools to greatly improve efficiencies of fertilizer use in agriculture," states Davidson, "although several economic and political impediments often stand in the way of their adoption."

In a draft of the IPCC's Fifth Assessment Report, four scenarios, known as representative concentration pathways (RCPs), have been adopted, and these represent possible means of reductions for a number of greenhouse gases. Dr. Davidson evaluated the scale of changes needed to meet the predicted N2O pathways.

Three of the IPCC's less aggressive scenarios could be met by reducing meat consumption, improving agricultural practices, or reducing emissions from industry. The most aggressive scenario, where atmospheric N2O concentrations stabilize by 2050, can only be met if a 50 percent reduction, or improvement, is achieved for each of the above.

To make these calculations, Dr. Davidson relied on data provided by the Food and Agricultural Organization, which assume that the global population will increase to 8.9 billion by 2050 and the daily calorific intake per capita will increase to 3130 kcal. They also assume that the average meat consumption of each person in the developed world will rise from 78 kg per year in 2002 to 89 kg per year in 2030 and from 28 kg per year in 2002 to 37 kg per year for each person in the developing world.

Assessing the likelihood of reducing meat consumption in the developed world by 50 percent, Davidson said, "If you had asked me 30 years ago if smoking would be banned in bars, I would have laughed and said that would be impossible in my lifetime, and yet it has come true. Similarly, there would be beneficial health benefits for most Americans and western Europeans to stop 'supersizing' and rather to reduce portion sizes of red meat."

Are such changes possible for diet? "That will depend," says Davidson, "not only on education about diet, but also on prices of meat. Some agricultural economists think that the price of meat is going to go way up, so that per capita consumption will go down, but those are highly uncertain projections."


Story Source:

The above story is based on materials provided by Woods Hole Research Center. Note: Materials may be edited for content and length.


Cite This Page:

Woods Hole Research Center. "How to curb discharge of the most potent greenhouse gas: 50-percent reduction in meat consumption and emissions." ScienceDaily. ScienceDaily, 13 April 2012. <www.sciencedaily.com/releases/2012/04/120413100859.htm>.
Woods Hole Research Center. (2012, April 13). How to curb discharge of the most potent greenhouse gas: 50-percent reduction in meat consumption and emissions. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2012/04/120413100859.htm
Woods Hole Research Center. "How to curb discharge of the most potent greenhouse gas: 50-percent reduction in meat consumption and emissions." ScienceDaily. www.sciencedaily.com/releases/2012/04/120413100859.htm (accessed July 31, 2014).

Share This




More Plants & Animals News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Visitors Feel Part of the Pack at Wolf Preserve

Visitors Feel Part of the Pack at Wolf Preserve

AP (July 31, 2014) — Seacrest Wolf Preserve on the northern Florida panhandle allows more than 10,000 visitors each year to get up close and personal with Arctic and British Columbian Wolves. (July 31) Video provided by AP
Powered by NewsLook.com
Florida Panther Rebound Upsets Ranchers

Florida Panther Rebound Upsets Ranchers

AP (July 31, 2014) — With Florida's panther population rebounding, some ranchers complain the protected predators are once again killing their calves. (July 31) Video provided by AP
Powered by NewsLook.com
Dangerous Bacteria Kills One in Florida

Dangerous Bacteria Kills One in Florida

AP (July 31, 2014) — Sarasota County, Florida health officials have issued a warning against eating raw oysters and exposing open wounds to coastal and inland waters after a dangerous bacteria killed one person and made another sick. (July 31) Video provided by AP
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) — Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:  

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile iPhone Android Web
      Follow Facebook Twitter Google+
      Subscribe RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins