Seeding the Seas with Iron

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Could sprinkling iron across the oceans prevent global warming? Sadly, it appears not. Since phytoplankton are the largest carbon dioxide sink on earth, larger than even all terrestrial plants, one idea was to dust the oceans with iron to feed phytoplankton. Scientists hoped the little organisms would quickly sink to about 300 meters, beyond the reach of that zooplankton, one level up on the food chain. Unfortunately, small-scale tests found that instead of sinking to the sea floor, the extra phytoplankton get quickly eaten by zooplankton, who metabolize and re-emit the carbon. Too bad. Still, a research ship is seeding waters around Galapagos anyway, just to bring attention to the role of phytoplankton in climate change.

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THE BIG PICTURE

You expect the big picture, and it's our job at Mother Jones to give it to you. And right now, so many of the troubles we face are the making not of a virus, but of the quest for profit, political or economic (and not just from the man in the White House who could have offered leadership and comfort but instead gave us bleach).

In "News Is Just Like Waste Management," we unpack what the coronavirus crisis has meant for journalism, including Mother Jones’, and how we can rise to the challenge. If you're able to, this is a critical moment to support our nonprofit journalism with a donation: We've scoured our budget and made the cuts we can without impairing our mission, and we hope to raise $400,000 from our community of online readers to help keep our big reporting projects going because this extraordinary pandemic-plus-election year is no time to pull back.

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