Engineering Science

Volume 6, Issue 2, June 2021

  • Marginally Adjusted Average LCA - Bridging the Gulf Between Attributional and Consequential LCA

    Nigel Howard

    Issue: Volume 6, Issue 2, June 2021
    Pages: 17-26
    Received: 2 May 2021
    Accepted: 17 May 2021
    Published: 27 May 2021
    Abstract: Life Cycle Assessment (LCA) can often reveal unexpected or perverse outcomes from environmental initiatives. There are two main approaches to LCA: Attributional (ALCA) typically measures the impacts arising from producing a functional unit of product from average market suppliers and technologies. Consequential (CLCA) measures the marginal impacts ... Show More
  • Evaluation of Impact Hammer Mill for Limestone Crushing for Acidic Soil

    Gizachew Tefera

    Issue: Volume 6, Issue 2, June 2021
    Pages: 27-32
    Received: 14 May 2021
    Accepted: 6 July 2021
    Published: 13 July 2021
    Abstract: Soil acidity becomes a serious threat to crop production in most highlands of Ethiopia particularly in Western parts of Oromia. Frequent tillage, removal of crop residues and mono-cropping and heavy rainfall contributes to soil acidification by leaching of cations. Agricultural limestone raises soil pH and reduces solubility of potentially toxic el... Show More