Last July, a chartered fishing boat strewed 100 tonnes of iron sulphate into the ocean, off the western coast of Canada. The goal was to supercharge the marine ecosystem. The iron was supposed to fertilize plankton, boost salmon population and sequester carbon. Currently, it’s still unclear whether the ocean responded as hoped, but this project has angered scientists, embarrassed a village of indigenous people and enraged opponents of geoengineering.
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