Back in 2012, a California businessman sailed a boat into the waters off western Canada and dumped 100 tons of iron filings into the Pacific Ocean. The goal was to to spawn an enormous bloom of phytoplankton, which would take in carbon dioxide as they grew, then die and fall to the bottom of the ocean, presumably locking away the greenhouse gasses, and helping to save the world from climate change.

It didn’t go over well. As details of the project came to light, many observers assailed it as an unscientific stunt, saying that it had endangered marine ecosystems without taking proper steps to verify if it had actually permanently removed carbon from the atmosphereคำพูดจาก สล็อตเว็�…