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>A.1. Ecological Comparisons of Computers</H1
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>&#13;   Scientists of 
   <A
HREF="http://www.reuse-computer.de"
TARGET="_top"
>ReUse project</A
>
   located at the 
   <A
HREF="http://tu-berlin.de/"
TARGET="_top"
>Technical University of Berlin</A
> recently compared the
   energy consumption of different computer types along the life cycle. The
   production of computers actually needs 535 kWh which is 10 % less than 4
   years ago. Most of the energy will be consumed while the computer is used
   for example at work for 8 hours/day. The energy consumption of new
   computers with 2,5-3 GHz processors is even in the
   stand-bye-mode still 100 Watt, whereas a 1,4 GHz PC needs 80
   Watt and a 4 year old PC only needed 60 Watt. Therefore from the
   ecological point of view it is better to buy an old computer
   that didn't need the energy for a new production and which
   consumes less electricity while it is being used.
</P
><P
>&#13;   LCD displays need less energy than other monitors. For this reason
   laptops are the most ecological types of the compared computers. They
   need the smallest amount of energy when they are used. And 3 year old
   laptops are better than new ones since their processors need less
   energy than new examples. There is also an article in the
   German computer magazine
   <A
HREF="http://heise.de/ct/"
TARGET="_top"
>C't 21/ 2003</A
>.
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