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Bill McKibben, author and founder of 350.org, leaning against fence, while being interviewed by woman reporter, man holding microphone next to her.

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Bill McKibben, author and founder of 350.org, speaking to news media while leaning against fence, microphone in front of him

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African-American woman holds anti oil company sign.

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Two women sitting on bench, one gesturing with hands, one wearing shirt with bicycle on it, man standing behind them with "clean energy" sign.

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Two young men addressing crowd at rally, one speaking through megaphone, both wearing earth t-shirts.

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Woman looking at cell phone, holding sign against KXL pipeline.

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Man holding anti KXL pipeline sign, woman holding sign next to him.

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Two women and one man wearing environmental t-shirts, talking while sitting on bench at climate change rally.

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Two women sitting on bench, one gesturing with hand, one holding "stop keystone" pipeline sign.

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Three women hold signs on environmental issues at rally.

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Woman holding up sign about KXL pipeline and China.

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Four young girls hold large bright blue banner about fossil fuels at environmental protest.

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Large crowd of people at climate change rally, seen from behind, banners and windmills above them.