A realistic DIY Direct Air Capture (DAC) machine built by a student for a school science project. The machine is placed on a classroom table. It includes a large plastic funnel with a small USB fan attached at the top to pull air in. The funnel is connected to a clear plastic bottle filled with cloudy limewater (calcium hydroxide solution) showing signs of a CO2 reaction. A pulley system made from string and a spool is used to raise and lower the lid of the bottle. A hand crank (screw Mehr sehen