The question you asked is a multiple-choice question about the problem that car exhaust contributes to. The options are:
a) noise pollution
b) climate change
c) rising gas prices
d) food contamination
The correct answer is option b) climate change. Car exhaust is one of the major sources of greenhouse gas emissions, such as carbon dioxide, methane, and nitrous oxide, that trap heat in the atmosphere and cause global warming. Global warming leads to climate change, which is the long-term alteration of weather patterns and environmental conditions, such as temperature, precipitation, sea level, and biodiversity. Climate change has many negative impacts on human health, agriculture, economy, and society.