How does car exhaust contribute to global warming?

Car exhaust contributes to global warming primarily by emitting greenhouse gases, such as carbon dioxide (CO₂) and nitrogen oxides (NO₂). These gases have the ability to trap heat in the Earth's atmosphere, creating a greenhouse effect. When sunlight reaches the Earth, some of it is reflected back into space, but greenhouse gases absorb and re-radiate some of this energy, thereby increasing the overall temperature of the planet.

The presence of CO₂ in car exhaust is significant because it is one of the main contributors to the enhanced greenhouse effect, leading to climate change. NO₂ also plays a role in the formation of ozone, which can further contribute to warming. Hence, the correct choice highlights the role of these emissions in promoting global warming through the accumulation of greenhouse gases in the atmosphere.