\frametitle{...and social \& political constraints}



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\centering
\includegraphics[width=5cm]{nein_zur_monstertrasse}

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    \vspace{.5cm}

    Sustainability doesn't just mean taking account of environmental constraints.

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    There are also \alert{social and political constraints},
    particularly for transmission grid and onshore wind
    development.

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\includegraphics[width=7cm]{Protestplakat-gegen-den-Bau-von-Windraedern-in-Hamburg-Deutschland.jpg}

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