His website states, "[Zehner] researches the social, cultural, political and economic conditions influencing energy policy priorities and project outcomes. His work also incorporates symbolic roles that energy technologies play within political and environmental movements. His other research interests include consumerism, urban policy, environmental governance, international human rights, and forgeries."
Zehner says that there are many facets of hybrid and electric cars, many of which are not very obvious unless one looks closer at such cars.
Many of these considerations do not make them very environmentally friendly to the Earth, according to Zehner.
In other words, Zehner says that hybrid and electric cars are no different than gasoline cars. And, they are not really as "green" as some might think, even though they are advertised as such.
The Sacramento Bee article that discusses Zehner and his book states that his conclusion is "backed by a National Academy of Sciences report."
In the SB article, Zehner is quoted: "Shifting from gasoline to electric vehicles is like switching a smoking habit from cloves to menthols. It isn't acceptable for doctors to promote menthol cigarettes -- should environmentally minded people promote alternative fuel cars?"
Page two concludes.