At the same time, their brains were scanned with positron emission technology (PET), using a radioactive compound that allowed the researchers to visualize where caffeine was going once it arrived in the brain.
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It is ideally packaged for the integration of the high-performance, zero-emission technology: by way of example, the four electric motors and the two transmissions can be positioned as close to the four wheels as possible and very low down in the vehicle.
ENGADGET: Visualized: Mercedes-Benz SLS AMG E-Cell bares all
"Mr Fisker's departure is not expected to impact the company's pursuit of strategic partnerships and financing to support Fisker Automotive's continued progress as a pioneer of low-emission hybrid electric powertrain technology, " the company said in a statement.
Finally, Declan looked at the BMW Hydrogen 7 - its only emission is water vapour but the technology for this type of green car is still being developed and currently, there are no models on sale.
BBC: NEWS | Programmes | Breakfast | Low carbon family: "Green" cars
It is the kind of technology that could make possible the elusive emission-free power plant.
"California Valley Solar Ranch will be an important component of our multi-technology portfolio of clean, zero-emission solar power facilities, " said Tom Doyle, president of NRG Solar.
Its lead in hybrid technology is under threat as other big carmakers scramble to bring low- and zero-emission vehicles to market before low-carbon legislation bites.
"Tidal turbine technology is one of the key renewable technologies that will help the UK achieve the carbon dioxide emission reduction targets and is a clean, sustainable replacement for ever more expensive fossil fuels, " she said.
BBC: NEWS | UK | Northern Ireland | Sea power to provide electricity
That change, called the Maximum Achievable Control Technology, or MACT, rule requires that coal- and oil-fired power plants reduce pollutant emission rates significantly.
Its cutting-edge technology ensures that the B-Class Electric Drive is not only sustainable (because it offers local emission-free driving) and agile (because of its high torque and acceleration), but also fully networked.
ENGADGET: Mercedes-Benz introduces B-Class Electric Drive, we go eyes-on
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