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Close! Black LOWERS the Earth's albedo (reflectivity). Good thoughts, even so. Black cars also consume more energy via air conditioning, and need to be washed more often.

Even more important to the air conditioning problem is the amount of heat accepted an stored by the materials in the cabin that make up the seats, dashboard, steering wheel, etc. We have a 2003 Mini Cooper, light blue with the white roof, but the nearly-black plastic and leather interior soaks up a lot of heat during the day and back-radiates it into the air and my body during the drive home. It takes a lot of energy to cool those surfaces and the air that they are busy heating.

Drag varies as the square of velocity
http://en.wikipedia.org/wiki/Drag_equation
See also http://www.greenhouse.gov.au/fuelguide/tips.html for info on reducing fuel consumption.

Drag varies as the square of velocity
http://en.wikipedia.org/wiki/Drag_equation
See also http://www.greenhouse.gov.au/fuelguide/tips.html for info on reducing fuel consumption.

Jon and Tartle -- thanks for the corrections.

Somehow I managed to have TypePad auto-publish this post before I was able to go back and check my formulas.

Check this GOOD black roof for the Prius:
http://www.solarelectricalvehicles.com/

Avisolo -- thanks for the link to the Solar Prius. I wonder how much weight the entire system adds to the car. Especially up high on the roof -- bad for handling. Still, a cool idea.

In 16 years (3-4 product lifecycles from now), the 2023 Prius will be to the 200 Prius what the current iMac is to a Mac SE, I'd wager.

Avisolo -- thanks for the link to the Solar Prius. I wonder how much weight the entire system adds to the car. Especially up high on the roof -- bad for handling. Still, a cool idea.

In 16 years (3-4 product lifecycles from now), the 2023 Prius will be to the 200 Prius what the current iMac is to a Mac SE, I'd wager.

Diego,

I don't know what inspired this post, but I want some. This is really creative, I love it. I think I will paint my roof white.

Hi Bob,

The inspiration was seeing that license plate at Whole Foods!

Child's Mind, you know.

- Diego

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