life cycle archives - planet forward - 克罗地亚vs加拿大让球

the life of a water bottle

fri, 09 mar 2018 19:57:29 +0000

the idea of this piece is to inform the viewer about the negative impacts plastic water bottles have on the environment. the viewer will watch how, from the start of its creation, the plastic water bottle contributes greatly to environmental degradation. after its short lifespan of being used one time, the water bottle can then be found within the environment or consumed by wildlife.

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life cycle analysis of sustainable technologies

wed, 22 may 2013 10:06:01 +0000

video produced by meredith moore (instructor: kristen swain) dr. waheed uddin, ole miss civil engineering professor, introduces a lifecycle analysis (lca) approach to evaluating alternative energy infrastructure and other sustainability projects. he argues that even though traditional lifecycle analysis considers agency costs and user costs associated with pavement service life, the impacts of infrastructure on the environment and energy use have been historically ignored. co2 emissions are directly proportional to fuel consumption. however, environmental and societal costs, essential for sustainable pavement projects, have been lacking from the traditional lca approach of transportation projects. these costs include: energy and sustainability related to construction phase, impacts of environmental degradation (air and water) due to vehicular traffic and runoff from roads, adverse impacts of ghg emissions resulting from vehicular traffic, especially in congested conditions, societal costs due to air pollution and water quality degradation from pavement surface runoff, and other environmental costs related to noise, visibility, etc. dr. uddin notes a high correlation between a country’s gross domestic product (gdp) and infrastructure stock, such as high gdp per capita versus high paved road density / high energy consumption per capita. performance of the energy infrastructure asset is poor in developing countries (22% interruptions in electric power) compared to emerging economies (11% interruptions for middle income countries) and high income countries (6% power losses). he argues that renewable energy infrastructure development is important worldwide because of the adverse impacts of traditional fossil fuel-based energy production on the environment. although the initial development and construction costs of renewable clean energy infrastructure assets — including hydraulic, wind, and solar — are high, his lca evaluation indicates that there is high return on investment due to creation of new jobs and avoidance of societal costs of carbon emissions.

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reduce greenhouse emissions from electric car charging stations

tue, 26 oct 2010 16:08:32 +0000

i am often asked if converting us cars to battery power would result in a net reduction of co2 emissions. after all the electricity needed to recharge tomorrow’s vehicle batteries will be generated at power plants which themselves have a carbon footprint. put another way, will the recharging of vehicle batteries from the electrical grid simply transfer the emissions of co2 from the vehicle tail pipes to the stacks of power generating stations without effecting a net reduction in emissions?

i published a paper in the journal “atmospheric environment” in which i calculate that converting passenger vehicles in the us to electric power over a ten-year period would reduce the 10-year greenhouse gas emissions from those vehicles by 23%.(atmospheric environment 44 (2010) 733–734).

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