Rather than build machines to remove carbon dioxide from air, we need to put machines into the air. Drones can do two things fast: seed oceans with iron filings to create phytoplankton blooms, that absorb CO2 and take it to the bottom of the sea seed land with seeds to grow trees, which must be done judiciously, with evidence based projects Both these solutions to extracting carbon from the air need to be run by scientists, not politicians, and they need to work in conjunction with every other technique we can devise for cleaning the atmosphere. But they need to start now. It is nutty professor time already, yes, we are already at that stage. Other species, as well as our own, can't afford for us to sit and wait for unanimity on what action to take.