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\begin{document}

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\LARGE

\centering

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\title
{%\vspace*{0.3\textheight}
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 \Huge
Cities affect the night up to 300 km distance}
\author{\color{white} \LARGE 
Jan Hollan, IDA Czech Section}
\date{\LARGE
Symposium for the Protection of the Night Sky, Bled, Oct 2007 \vspace*{\fill}
}

\maketitle

\sect{Light spreads quickly and far...

... and some disperses as it travels through the air}


\sect{Anonymous Czech (celestial) churches:}

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%\sect{\wwwt{How the light disperses}{scatt_en.pdf}}

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\sect{National Park Service Night Sky Team (USA)

documents the views from most abandoned sites since 2002
}

\sect{Mc Donald Flat, Parashant Nat. Monument, Arizona

is 150 km from Las Vegas:}

\ini{150z.jpg}

\ini{150p.jpg}

\sect{Mt Washington, Great Basins NP, Nevada

is 300 km from Las Vegas:}

\ini{300z.jpg}

\ini{300p.jpg}

\sect{To make even remote sites natural again

near-horizontal emissions from cities should become zero

and intensities of illumination reduced.}


\end{document}
