Quote:
Originally Posted by Tawn
I'm supposed to keep the (possibility contaminated from falling through the air) rain off my veggie patch??? 
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Depends on the area you are in which affects what contaminants are in the rain before it lands—you have read about acid rain for instance? After it lands, if you happen to collect rainwater in a cistern from runoff from your roof, you might want to consider what is on your roof such as bird and animal feces.