How do Carbon Emissions from Electric Vehicles Compare to Conventional Ones on a Life Cycle Basis?


Consequential life cycle air emissions externalities for plug-in electric vehicles in the PJM interconnection (13 page pdf, Allison Weis, Paulina Jaramillo and Jeremy Michalek, Environ. Res. Lett., Feb 9, 2016)

Today we review an assessment of the life cycle emissions their costs from hybrid, plug-in hybrid vehicles compared to conventional ones, driven in states where the majority of the electric power generated is from coal or natural gas. Not surprisingly, the conclusion is that plug-in hybrid emissions are more damaging than hybrid and conventional vehicles under current conditions. The same analysis was done in a future power regulated scenario where renewable energy sources partly replace the carbon burning sources (e.g. 3 to 20% more wind power). Here, the hybrid and plug-in vehicles have higher SO2 and other pollutant emissions and lower PM 2.5 emissions while NO2 and greenhouse gas emissions can be higher or lower than conventional, depending on the individual case. In summary, as applied to Canada, it appears that electric cars make sense in regions where the power sources are largely renewable (e.g. Ontario, Quebec and BC where almost all electric power is nuclear or hydro) but do make sense in regions were power is generated from carbon fuels (such as Alberta, Saskatchewan and the Maritimes).

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To see Key Quotes and Links to key reports about this post, click HERE

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