Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Buying local isn't always better for the environment

04.02.2009
Shopping locally may not be as good for the environment as having food delivered, according to new research by the University of Exeter (UK). Published in the journal Food Policy, the study shows that, on average, lower carbon emissions result from delivering a vegetable box than making a trip to a local farm shop.

The researchers compared trips to a local farm shop with deliveries made by companies that distribute organic vegetable boxes to their customers. They study also took into account the carbon emissions produced by cold storage, packing and the transportation of goods to a regional 'hub'. By bringing this data together, the researchers were able to calculate the total carbon emission.

The study found that if the average car journey made to a farm shop is a round-trip of more than 6.7km, then home delivery was a better option even if the competing farm shop used no lighting, heating or chilling. While a delivery van will travel up to 360km to deliver an organic vegetable box, this trip will cover a large number of addresses so the carbon emissions per customer will be surprisingly low.

David Coley from the Centre for Energy and the Environment at the University of Exeter, lead author on the study, said: "People are becoming familiar with the phrase 'food miles', but don't have a very clear understanding of what it means. We need to look more thoroughly at the many factors that lie behind putting food on our tables, before we can say what is better or worse for the environment."

The study acknowledges that there are many other factors in addition to 'food miles' that concern consumers. For example, issues around local economics and the environmental impact of different food production methods.

David Coley of the University of Exeter adds: "Rather than focus on food miles, it would be more meaningful to look at the carbon emissions behind each food item. While the concept of food miles was useful in getting people to think about the issues around carbon emissions and food transport, it's time for a more sophisticated approach."

Although the last decade has seen a massive increase in home delivery, mainly as a result of internet shopping, travel for food and household items still represents 5% of car use.

This study was entitled Local food, food miles and carbon emissions: A comparison of farm shop and mass distribution approaches.

Sarah Hoyle | EurekAlert!
Further information:
http://www.exeter.ac.uk

More articles from Studies and Analyses:

nachricht The Great Unknown: Risk-Taking Behavior in Adolescents
19.01.2017 | Max-Planck-Institut für Bildungsforschung

nachricht A sudden drop in outdoor temperature increases the risk of respiratory infections
11.01.2017 | University of Gothenburg

All articles from Studies and Analyses >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Traffic jam in empty space

New success for Konstanz physicists in studying the quantum vacuum

An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...

Im Focus: How gut bacteria can make us ill

HZI researchers decipher infection mechanisms of Yersinia and immune responses of the host

Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...

Im Focus: Interfacial Superconductivity: Magnetic and superconducting order revealed simultaneously

Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.

While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...

Im Focus: Studying fundamental particles in materials

Laser-driving of semimetals allows creating novel quasiparticle states within condensed matter systems and switching between different states on ultrafast time scales

Studying properties of fundamental particles in condensed matter systems is a promising approach to quantum field theory. Quasiparticles offer the opportunity...

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Sustainable Water use in Agriculture in Eastern Europe and Central Asia

19.01.2017 | Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

 
Latest News

Helmholtz International Fellow Award for Sarah Amalia Teichmann

20.01.2017 | Awards Funding

An innovative high-performance material: biofibers made from green lacewing silk

20.01.2017 | Materials Sciences

Ion treatments for cardiac arrhythmia — Non-invasive alternative to catheter-based surgery

20.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>