Internal combustion engines produce exhaust fumes. Polycyclic hydrocarbons would be a good place to start. Here’s an older study: https://www.sciencedirect.com

Internal combustion engines produce exhaust fumes. Polycyclic hydrocarbons would be a good place to start. Here’s an older study: https://www.sciencedirect.com/science/article/pii/S1352231003007994 https://www.sciencedirect.com/science/article/pii/S135223100...