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Your search keyword '"MacLean, Heather L."' showing total 215 results
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215 results on '"MacLean, Heather L."'

8. Life cycle assessment of emerging technologies: Evaluation techniques at different stages of market and technical maturity

Author

Bergerson, Joule A, Brandt, Adam, Cresko, Joe, Carbajales‐Dale, Michael, MacLean, Heather L, Matthews, H Scott, McCoy, Sean, McManus, Marcelle, Miller, Shelie A, Morrow, William R, Posen, I Daniel, Seager, Thomas, Skone, Timothy, and Sleep, Sylvia

Subjects
Built Environment and Design, Building, early stage technology assessment, environmental impacts, industrial ecology, life cycle assessment, research and development, unintended consequences, Environmental Sciences
Abstract

Abstract: Life cycle assessment (LCA) analysts are increasingly being asked to conduct life cycle‐based systems level analysis at the earliest stages of technology development. While early assessments provide the greatest opportunity to influence design and ultimately environmental performance, it is the stage with the least available data, greatest uncertainty, and a paucity of analytic tools for addressing these challenges. While the fundamental approach to conducting an LCA of emerging technologies is akin to that of LCA of existing technologies, emerging technologies pose additional challenges. In this paper, we present a broad set of market and technology characteristics that typically influence an LCA of emerging technologies and identify questions that researchers must address to account for the most important aspects of the systems they are studying. The paper presents: (a) guidance to identify the specific technology characteristics and dynamic market context that are most relevant and unique to a particular study, (b) an overview of the challenges faced by early stage assessments that are unique because of these conditions, (c) questions that researchers should ask themselves for such a study to be conducted, and (d) illustrative examples from the transportation sector to demonstrate the factors to consider when conducting LCAs of emerging technologies. The paper is intended to be used as an organizing platform to synthesize existing methods, procedures and insights and guide researchers, analysts and technology developer to better recognize key study design elements and to manage expectations of study outcomes.

Published
2020

13. Health benefits of US light-duty vehicle electrification: Roles of fleet dynamics, clean electricity, and policy timing.

Author

Schmitt, Jean, Hatzopoulou, Marianne, Abdul-Manan, Amir F. N., MacLean, Heather L., and Posen, I. Daniel

Subjects
INTERNAL combustion engines, CLEAN energy, ELECTRIC power production, LIQUID fuels, AIR quality
Abstract

We present a dynamic perspective to quantify the air quality–related health impacts of the electrification of light-duty vehicles in the United States between 2022 and 2050. Using a fleet turnover model and future electricity generation mix scenarios, we compare ambitious vehicle electrification to fleet renewal relying on newer internal combustion engine vehicles, without electric vehicles. The model includes vehicle-level pollutant emission factors and a reduced complexity air quality and valuation model and covers direct (tailpipe, brake wear, and tire wear) and indirect (production of electricity and liquid fuels) emissions of NOx, SO2, PM2.5, NH3, and VOCs, with a breakdown at the county level to identify geographical disparities in the distribution of health impacts. Short-term health benefits are mostly generated by reductions in NOx emissions from newer gasoline vehicles, while fleet electrification generates further benefits in the long term. The electricity mix plays a crucial role in the success of electrification policies. With continued grid decarbonization, electrification would reduce harmful air quality– related health impacts cumulatively by 84 to 188 billion USD over the study period, compared with fleet renewal without electric vehicles. In contrast, artificially freezing the 2022 grid would make electrification responsible for 32 to 71 billion USD additional health disbenefits compared with fleet renewal. Finally, we show that while fleet electrification achieves most of its benefits over fleet renewal in the long term, delaying the implementation of such policies would sacrifice meaningful cumulative benefits. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Transforming Energy

Author

MCKELLAR, JENNIFER M., MACLEAN, HEATHER L., and BERGERSON, JOULE A.

Published
2015

43. Transforming energy: powering tomorrow begins with making changes today

Author

McKellar, Jennifer M., Maclean, Heather L., and Bergerson, Joule A.

Subjects
Sustainable development -- Environmental aspects -- Economic aspects, Energy minerals -- Environmental aspects, Fossil fuels -- Environmental aspects, Power resources -- Supply and demand -- Environmental aspects -- Economic aspects, Environmental issues, Social sciences
Abstract

IMAGINE a morning when the lights and coffee machine don't work, your home has no heat and your car doesn't start. We generally don't give much thought to where our [...]

Published
2015

50. Greenhouse Gas Emissions from waste management--assessment of quantification methods

Author

Mohareb, Eugene A., MacLean, Heather L., and Kennedy, Christopher A.

Subjects
Greenhouse gases -- Environmental aspects, Refuse and refuse disposal -- Research, Emissions (Pollution) -- Composition -- Environmental aspects, Environmental services industry, Environmental issues, Science and technology
Abstract

ABSTRACT Of the many sources of urban greenhouse gas (GHG) emissions, solid waste is the only one for which management decisions are undertaken primarily by municipal governments themselves and is [...]

Published
2011
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