50 years ago, protests and promises launched the Trans-Alaska Pipeline
Declining oil production poses dangers to the massive structure
![Trans-Alaska Pipeline](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/02/121319_md_50ya-transalaskanpipe_feat.jpg?fit=1028%2C579&ssl=1)
The Trans-Alaska Pipeline was an engineering marvel when it was constructed, but declining oil production has rendered its future uncertain.
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