Device and method for removing carbon dioxide from motor vehicle exhaust

A method of removing carbon dioxide from the exhaust gas of a motor vehicle, the method comprising the steps of:

• providing a carbon dioxide filter having a housing adapted to be mounted onto the exhaust pipe of a motor vehicle, said exhaust pipe having an exit opening with a diameter defining an open area, and a quantity of carbon dioxide filter material retained within said housing, said housing comprising a plurality of apertures, wherein the combined open area of said apertures is greater than the open area of said exit opening of said exhaust pipe;
• mounting said carbon dioxide filter onto said exhaust pipe;
• whereby the density of said carbon dioxide filter material and the combined open area of said apertures is chosen such that the flow rate of exhaust gas passing from said exhaust pipe through said filter is not reduced by said filter and such that no more than 20 percent of the carbon dioxide in said exhaust gas is retained by said filter.