Bamboo Makes Better Bridges

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dn13107-1_400.jpg Bridges of bamboo could provide a cheaper, more environmentally sustainable engineering solution than steel. New Scientist reports that a prototype bridge has been built in China using horizontal beams made from a bamboo composite. The 33-foot span proved strong enough to support even heavy trucks. It was also cheaper to build and more environmentally friendly to make than steel or concrete, says developer Yan Xiao of the University of Southern California and Hunan University.

Pound-for-pound, bamboo is stronger than steel when stretched and more robust than concrete when compressed. Stalks mature in a few years, rather than decades for trees, so more can be harvested from the same amount of land. Plus bamboo is a grass that is harvested like mowing a lawn, leaving the roots intact to regrow. Whereas cement production releases 5-10% of total global carbon dioxide emissions, bamboo soaks it up as it grows. All this suggests a more sustainable engineering solution in China, says New Scientist… Sure, for China, but why not everywhere?

Julia Whitty is Mother Jones’ environmental correspondent. You can read from her new book, The Fragile Edge, and other writings, here.

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SIX TRUTHS

Reclaiming power from those who abuse it often starts with telling the truth. And in "This Is How Authoritarians Get Defeated," MoJo's Monika Bauerlein unpacks six truths to remember during the homestretch of an election where democracy, truth, and decency are on the line.

Truth #1: The chaos is the point.

Truth #2: Team Reality is bigger than it seems.

Truth #3: Facebook owns this.

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Truth #5: It's about minority rule.

Truth #6: The only thing that can save us is…us.

Please take a moment to see how all these truths add up, because what happens in the weeks and months ahead will reverberate for at least a generation and we better be prepared.

And if you think journalism like Mother Jones'—that calls it like it is, that will never acquiesce to power, that looks where others don't—can help guide us through this historic, high-stakes moment, and you're able to right now, please help us reach our $350,000 goal by October 31 with a donation today. It's all hands on deck for democracy.

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