what are cats on a car

In a car, "cats" refer to catalytic converters. A catalytic converter is an essential part of a vehicle's exhaust system that helps reduce harmful emissions by converting toxic gases from the engine into less harmful substances like carbon dioxide and water vapor. It contains precious metals that catalyze chemical reactions to treat exhaust gases, reducing pollutants such as carbon monoxide, hydrocarbons, and nitrogen oxides. This device is crucial for meeting emission standards and reducing environmental pollution.