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Trees in our coffee

Wooden coffee stirrers are typically made from birch wood. (Fleet River Bakery, London)
James E. Petts
/
WikiMedia Commons
Wooden coffee stirrers are typically made from birch wood. (Fleet River Bakery, London)

You can find trees in the most awesome habitats, like Redwood National Park. and also in the most everyday places, like on the counter of your favorite coffee shop.

The wooden coffee stirrer has a history shaped by public opinion about sustainability. In the mid-20th century, disposable plastics became widely used because they were more convenient for takeout orders and fast food chains. 

But they are composed of non-renewable fossil fuels and are too small for recycling. So they ended up in landfills, breaking into microplastics with negative effects on the environment. In the last decade, recognition of the harm of plastic pollution has led to a shift from plastic to wood.

That's where trees figure in. Wooden coffee stirrers are typically made from birch wood. Its straight grain and smooth texture, making it suitable for making thin and uniform stirrers that combines flexibility and cost-effectiveness.

Making wooden coffee stirrers starts with peeling logs to remove the bark, which are cut into small pieces and turned on lathes into rods. Those are dried to reduce moisture content, preventing warping or cracking. They then undergo sanding, quality control and packaging, and are sent off to your coffee shop.

Stirrers are biodegradable, meaning they break down naturally, reducing environmental impact. Unlike metal or plastic alternatives, wood doesn't interfere with the flavor of the coffee. And wooden stirrers add a touch of warmth and natural beauty to the coffee-drinking experience.

So, the next time you find yourself waiting to pick up your order, recognize the presence of birch trees to in your coffee experience.

Dr. Nalini Nadkarni is an emeritus professor of both The Evergreen State College and the University of Utah, one of the world’s leading ecologists and a popular science communicator. Dr. Nadkarni’s research and public engagement work is supported by the National Geographic Society and the National Science Foundation. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author and do not necessarily reflect the views of the National Science Foundation. @nalininadkarni
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