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MIT Energy Initiative report on transforming the US transportation system by 2050 to address climate challenges

Green Car Congress

We should continue to adopt policies to reduce transportation energy demand and emissions, while using our evolving information base to assess and reassess which options have the greatest leverage. Recharging requirements for PHEVs are not the same as for BEVs: especially, the demand for “fast recharging” stations is really not there.

MIT 150
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We Need More Than Just Electric Vehicles

Cars That Think

We used this information to estimate annual greenhouse-gas emissions from the fuel cycle, which depend partly on the average vehicle size and partly on how much vehicle efficiency improves over time. A couple of hours at home is sufficient to recharge from a typical daily commute, while overnight charging is needed for longer trips.