ENVIRONMENTAL DATA ANALYSIS			
Exercise			
Name:			
date:			
Q 1: A census in 1983/84 attempted to determine how much water is used			
in New York City by the different group of users. Here is the result:			

user	use 	use	use
  	   (mill gal/d)	(%)	(km^3/y)
residential	795	?	?
industrial and commercial	255	?	?
government and public	210	?	?
leakage	135	?	?
unaccounted for	105	?	?
sum:	?	?	?

Please replace the question marks by numbers calculated with your			
spreadsheet. Also fill in the following numbers. About 7.5 million			
people live in New York City. 			

total consumption of water in NYC (mill gal/d):			?
average consumption per person (gal/d):			?
average consumption per person (l/d):			?

Q 2: Express the water consumption of New York City as percentage of			
the amount of precipitation over the New York City area.			

	flow rate	water consumption	
	(km^3/y)	(%)	
Precipitation	0.8	?	


Q 3: Make a pie diagram of the split up of the NYC water consumption
from Q 1.

Store the file as an Excel spreadsheet in your account and on the backup disk
next time we meet.