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rbnbobo: mt. lemmon
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rbnbobo: dusty haze over tucson
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rbnbobo: biosphere II
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rbnbobo: looking in on the desert
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rbnbobo: i think this is one of the lungs
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rbnbobo: escape route
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rbnbobo: inside one of the lungs
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rbnbobo: misty rainforest
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rbnbobo: rowboat ride on the ocean?
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rbnbobo: an extensive basement
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rbnbobo: the desert's function is to produce oxygen
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rbnbobo: sandy beach, ocean, unhealthy coral reefs
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rbnbobo: biosphere II