scholarly journals Implementing PURPA : Renewable Resource Development in the Pacific Northwest : Executive Summary.

1990 ◽  
Author(s):  
◽  
Author(s):  
Amin Mirkouei ◽  
Karl R. Haapala ◽  
John Sessions ◽  
Ganti S. Murthy

Recent growing interest in reducing greenhouse gas (GHG) emissions requires the application of effective energy solutions, such as the utilization of renewable resources. Biomass represents a promising renewable resource for bioenergy, since it has the potential to reduce GHG emissions from various industry sectors. In spite of the potential benefits, biomass is limited due to logistical challenges of collection and transport to bio-refineries. This study proposes a forest biomass-to-bio-oil mixed supply chain network to reduce the GHG emissions compared to a conventional bioenergy supply chain. The mixed supply chain includes mixed-mode bio-refineries and mixed-pathway transportation. Life cycle assessment is conducted for a case study in the Pacific Northwest with the assistance of available life cycle inventory data for biomass-to-bio-oil supply chain. Impact assessment, on a global warming potential (GWP) basis, is conducted with the assistance of databases within SimaPro 8 software. Sensitivity analysis for the case investigated indicates that using the mixed supply chain can reduce GHG emissions by 2–5% compared to the traditional supply chain.


1973 ◽  
Vol 3 (2) ◽  
pp. 265-276 ◽  
Author(s):  
W. J. Libby

This paper is based in large part on recent reviews of tree breeding programs in the southeastern United States, the Pacific Northwest, New Zealand, southeastern Australia, and Taiwan. Domestication, which here includes tree breeding, is discussed generally in terms of original species variability, the processes of selection and packaging, and the returns via a more useful renewable resource. Six reasons why forest geneticists and tree breeders plant trees are given, along with the different requirements for site, planting design, number of trees, and number of entry genotypes or lines for each reason. A flow chart is presented, showing the various kinds of plantations and forests established during a domestication program, and the physical movement of gene packages between such plantations and forests. The information flow within the scheme is also discussed.


2019 ◽  
Vol 39 (4) ◽  
pp. 452
Author(s):  
Margaret H. Massie ◽  
Todd M. Wilson ◽  
Anita T. Morzillo ◽  
Emilie B. Henderson

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