what is the limit of light pollution?

MadSci Network: Environment & Ecology

Subject: what is the limit of light pollution?

Date: Wed Aug 19 08:45:01 1998
Posted by kamini
Grade level: 10-12
School: ______
City: kuala lumpur State/Province: WP
Country: malaysia
Area of science: Environment & Ecology
ID: 903534301.En

Message:


i've read about light pollution and i want to know at what point it is 
considered a kind of pollution.is it that any form of light is 
considered pollution and pollution does not neccesarily have a 
negative impact? tell me more about the definitions of pollution.
if possible, tell me why the heart beats faster and people can have 
high blood pressure due to noise pollution?
thanx

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