\documentclass[english,german]{scrartcl}
\usepackage[latin1]{inputenc}
\usepackage{geometry}
\geometry{verbose,a4paper,tmargin=1.75cm,bmargin=2cm,lmargin=2cm,rmargin=2cm,headheight=0.8cm,headsep=0.5cm,footskip=0.5cm}
\usepackage{babel}
\usepackage{url}
\urlstyle{same}
\newcommand\email{\begingroup \urlstyle{same}\Url}\usepackage{graphicx}
\usepackage{units}
\usepackage{tabularx}
\usepackage{wasysym} % enable use of \permil instead of \textperthousand
\usepackage{marvosym}
\usepackage{arabtex}
\usepackage{hyphenat}
\usepackage{booktabs}
\usepackage{mdwlist}
\renewcommand{\thefootnote}{\relax}
\usepackage{index}
\newindex{key}{kdx}{knd}{Keywords}
\newindex{author}{idx}{ind}{Authors}
\usepackage{fancyhdr}
\pagestyle{fancy}
\renewcommand{\headrulewidth}{0pt}
\fancyfoot{}
\usepackage{ifpdf}
\ifpdf
%\usepackage[activate]{pdfcprot}
%\usepackage[owner=Tapioka, print=true, copy=true, edit=false, annotate=false,set]{pdfcrypt}
%encryption: not supported any more (since pdftex 1.10)
\usepackage[pdftex]{thumbpdf}
\usepackage[pdftex]{hyperref}
\hypersetup{pdftitle={Estimating the Non Market Value of Traditional Gardens Around the City of Gazvin in Iran},pdfauthor={Naghmeh Mobarghei, Afsaneh Naeimyfar, Amir Saman Mohseni},pdfsubject={Tropentag 2010: Abstract},pdfkeywords={Ecosystem services, Gazvin, Iran, non-market value, traditional garden},pdfpagemode=None,colorlinks=true}
\else
\usepackage{ae}
\usepackage{textcomp}
\fi
\begin{document}
\ifpdf
\parbox[b]{2.5cm}{\resizebox*{2.5cm}{!}{\includegraphics{dtt2010.jpg}}}
\else
\parbox[b]{2.5cm}{\resizebox*{2.5cm}{!}{\includegraphics{dtt2010.eps}}}
\fi
\hfill
\parbox[b]{13.4cm}{\centering \large{\textbf{Tropentag, September 14-16, 2010, Zurich}}\\[1ex] \Large{``World Food System  ---\\A Contribution from Europe''\\[2ex]}}
\hspace{0.1cm}
\begin{center}
\Large{\textbf{Estimating the Non Market Value of Traditional Gardens Around the City of Gazvin in Iran\footnote{\textbf{Contact Address:} Naghmeh Mobarghei, University of Shahid Beheshti, Environmental Science Research Institute, Environmental Planning and Design, Flat 3 - No 44- West Kavian Alley- Jolfa Street- Shariati Street, Tehran, Iran, \mbox{e-mail}: \email{n_mobarghaee@sbu.ac.ir}}\\[0.8ex]}}
\normalsize{\textsc{Naghmeh Mobarghei$^{1}$, Afsaneh Naeimyfar$^{2}$, Amir Saman Mohseni$^{3}$}}
\end{center}
\begin{itemize*}
\item[]{\small{\textit{$^{1}$University of Shahid Beheshti, Environmental Science Research Institute, Environmental Planning and Design, Iran}}}
\item[]{\small{\textit{$^{2}$Islamic Azad University, Shahr-e-Qods Branch, Dept. of Agriculture, Iran}}}
\item[]{\small{\textit{$^{3}$University of Payame Noor, Architecture Engineering, Iran}}}
\end{itemize*}
\index[author]{Mobarghei, Naghmeh}
\index[author]{Naeimyfar, Afsaneh}
\index[author]{Mohseni, Amir Saman}
\begin{center}
\vspace{1.1cm}
\textbf{Abstract}
\begin{abstract}
\normalsize{
Planted or cultivated ecosystems so called semi natural ecosystems, has many non market benefits that there are no market to show them. Some of the most valuable services in the gardens are absorbing the CO$_{2}$ that is very important in reducing the greenhouse gas, producing the O$_{2}$, reducing the disturbance like flood and storm prevention, increasing the water supply, preventing the soil erosion, increasing the pollination, reducing the air pollution and absorbing the PM10, and their effects on increasing the price of around  houses. 



When the garden is located near the city, there are a high tendency for changing the land use and converting them to the settlement area. Calculating the value of non market services and choosing a way to pay this value to orchardists, is an appropriate way to reducing the tendency for changing the land use and keeping the gardens. 



Gazvin is an industrial city in central part of Iran. Around the city has covered by   traditional gardens with approximately 2\,500 hectare area. The most important products of these gardens are grape, almond, apricot, walnut and pistachio. The non market value of these gardens has been calculated by cost based valuation methods that is one of the main valuation methods in environmental economics. The results show that each hectare of these gardens has a value more than 500 US\$ just for seven ecosystem services. Knowing this value can help policy makers to choose an appropriate decision about the conservation of the gardens and prevent rapid land use change in this area. 



}

\vspace{0.5cm}
\end{abstract}
\end{center}
\noindent \textbf{Keywords:} Ecosystem services, Gazvin, Iran, non-market value, traditional garden
\index[key]{Ecosystem services}
\index[key]{Iran!Gazvin}
\index[key]{Non"=market value}
\index[key]{Peri=urban!agriculture}
\index[key]{Gardens!traditional}
\end{document}