What is the gaseous oxides that petrol engine gives off?

Petrol engines primarily emit carbon dioxide (CO2), carbon monoxide (CO), nitrogen oxides (NOx), and unburned hydrocarbons (HC). The combustion process generates CO2 as a major greenhouse gas, while CO is a toxic pollutant resulting from incomplete combustion. NOx compounds contribute to smog and acid rain, and unburned hydrocarbons can lead to the formation of ground-level ozone. Collectively, these gases have significant environmental and health impacts.