Sustainable development of food production: a case study on scenarios for pig production

To study future, sustainable production systems, a step-wise method was used to create three future scenarios for pig production based on different sustainability goals. The first scenario focused on animal welfare and the natural behavior of the animals. The second targeted low impacts on the environment and the efficient use of natural resources. The third scenario aimed at product quality and safety. Each scenario fulfilled different aspects of sustainability, but there were goal conflicts because no scenario fulfilled all sustainability goals. The scenarios were then parameterized. The environmental impact was calculated using the life-cycle assessment (LCA) methodology, and the economic cost was calculated from the same data set. The cost per kilo of pork was highest for the animal welfare scenario and similar for the other two scenarios. The environmental scenario had the lowest environmental impact, and the product-quality scenario the highest. The results are discussed based on different future priorities.     

Masonry fireplace emissions test method: Repeatability and sensitivity to fueling protocol

A test method for masonry fireplaces has been evaluated during testing on six masonry fireplace configurations. The method determines carbon monoxide and particulate matter emission rates (g/h) and factors (g/kg) and does not require weighing of the appliance to determine the timing of fuel loading.The intralaboratory repeatability of the test method has been determined from multiple tests on the six fireplaces. For the tested fireplaces, the ratio of the highest to lowest measured PM rate averaged 1.17 and in no case was greater than 1.32. The data suggest that some of the variation is due to differences in fuel properties.The influence of fueling protocol on emissions has also been studied. A modified fueling protocol, tested in large and small fireplaces, reduced CO and PM emission factors by roughly 40% and reduced CO and PM rates from 0 to 30%. For both of these fireplaces, emission rates were less sensitive to fueling protocol than emission factors.     

Shrimps, bananas and mangroves: A dispute resolved

Ecuadorian shrimp farmers suddenly found themselves in a contentious triangle with environmentalists and banana growers in a conflict that was crippling the Ecuadorian economy. The controversy concerned the Taura Syndrome, a disease allegedly caused by banana pesticides which was killing shrimp in the Gulf of Guayaquil. The shrimp farmers had responded by venturing into new areas to get out of the way of the pesticide runoff. The new areas happened to be populated by sensitive mangrove trees, which enraged the environmentalists. The dispute intensified when the parties lobbied other governments to ban one another's products. An innovative Ecuadorian dispute resolution organization intervened to help the parties think of the problem in a new way. They worked with the parties to pool their resources, so that they were working toward the same ends, rather than fighting against one another. The intervention succeeded in institutionalizing a new relationship between the shrimp farmers, banana growers, and environmentalists that has allowed the parties to resolve their conflict and to handle others over the long-term.