When I’m casually using my laptop, it uses between 16 and 21 watts.  I played around a little with the display brightness controlls, and I found that as much as 25% of the laptop power is used by the display backlight.  When the display brightness is all the way down, my laptop uses 16-17 watts.  When the display birghtness is fully bright, it uses about 20-21 watts.

This means that you can extend the lenght of time that you can run a laptop on a single battery charge by 20-40 minutes by turning the display brightness down.

The environmental impact of this energy savings is not very significant to other home energy saving measures, such as using LED Christmas lighting.

Disclosure: I am an engineer for HP, but I have not worked on designing any laptop systems nor have I done developement on power efficiency.

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Then I started to think about how incredibly not aerodynamic the trailer is. Anyone who has participated in a pine wood derby knows that a big block on wheels isn’t the best way to go. If you’ve felt the wind come off the end or sides of one of these trucks as it drives by, then you have felt the energy that is lost because of the inefficient design of the big box trailer.

I suppose they are made that way because that is the most inexpensive way to make a trailer. But with diesel prices near $5 per gallon, maybe it’s time to re-think that.

If big-rig trucks were more aerodynamic, then they would get better gas mileage. If they get better gas mileage, then that reduces the cost of delivery for the products they are delivering. This, in turn, can keep consumer prices slightly lower. Lower prices helps the economy.

So much of our economy depends on the distribution of goods, that maybe it is time to think uniquely about making our means of distribution more affordable.

(Image source)

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Divorced couples use more space in their respective homes, equating to 38 million more rooms to heat, light, and air condition. Divorced couples also consume 73 billion kilowatt-hours more of electricity and 627 billion gallons more of water than married couples.

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