Micromotors were able to remove 90 precent of carbon dioxide in certain ionised water solutions. The success rate was 88 percent in seawater. The resulting product is simple calcium carbonate, which is commonly found in seashells and coral. However, the bots require a flow of hydrogen peroxide, which is used to propel them forward.
But despite future hurdles, these bots are exciting — they can travel 100 micrometers per second, and there are hope that they can be used as part of a water treatment system.