Abstract: An anti-pollution system for an internal combustion engine wherein a container within which is a body of water has an air injection system including first tubing extending into the container, second tubing connected to extract combustion gases from the engine exhaust system to introduce them into the container, third tubing extending from within the container to the engine intake system to subject the interior of the container to vacuum, and a heater energized from the vehicle ignition system for heating the body of water, so that during engine operation combustion gases are introduced into the container where they are cleansed, enriched with air and passed into the fuel intake system.