WASHINGTON, Sept. 19, 2022 — Farmers used to worry about weeds. Then, herbicides solved that problem. At least for a while. In 1997, there were 432 new patents for herbicides; by 2009, there were only 65. Developing broad-spectrum glyphosate and “Roundup Ready” crops worked so well that people basically stopped looking for new herbicides. But then the weeds started fighting back. https://youtu.be/vsbYyUfLwh8

 
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