"Saving the Earth Inside the Office" article in the February 25 Washington 
Post tells how the Discovery Corporation is making its central headquarters 
building here in Silver Spring environmentally friendly.  Discovery also is 
starting a Science TV channel.
 
    Let's hope Discovery uses the SI as its PRIMARY system of units.

    The Post article tells how Discovery will capture 400 gallons rain water in 
each of three tanks for vegetation watering.  It sounds like a lot of water; 
however, 1200 gallons equals about 5.1 kL (cubic metres) of water which is not 
much, but it's a start.  To put this  in perspective, a Potomac hydrologist 
discovered during a drought here a couple of years ago that a single tree 
drinks up to 100 gallons per day.

    Remember that one millimetre (1 mm) of rain over one square metre equals a 
litre of rain water.  using the SI is ever so simple and meaningful.

    Let's try to get Discovery to use the SI exclusively on its new science TV 
Channel.  The Science Channel will be broadcast worldwide.

Stan Doore
    

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