A car is a major investment, second only to buying a house, for most people. Part of the cost of a modern car is its pollution control system – the catalytic converter and other equipment that removes smog-forming pollution from the tailpipe.
A car is a major investment, second only to buying a house, for most people. Part of the cost of a modern car is its pollution control system – the catalytic converter and other equipment that removes smog-forming pollution from the tailpipe.