Ultracapacitors Make City Buses Cheaper, Greener

(PhysOrg.com) -- A fleet of 17 buses near Shanghai has been running on ultracapacitors for the past three years, and today that technology is coming to the Washington, DC, for a one-day demonstration. Chinese company Shanghai ...

Can coal mines be tapped for rare earth elements?

Deposits of designated critical minerals needed to transition the world's energy systems away from fossil fuels may, ironically enough, be co-located with coal deposits that have been mined to produce the fossil fuel most ...

New study offers roadmap for coal phase-out

Coal will need to be phased out of the world's economy to meet the climate change challenge, but this can work properly only if social objectives and local stakeholders are involved in the process, an international group ...

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