system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why are there more bans on Diesel engine cars rather than Gasoline engines?
gpt
Diesel engines emit higher levels of particulate emissions that are harmful to humans.  This is pretty obvious when you see a heavily loaded diesel vehicle take off from a stoplight, belching out black clouds of smoke.  

Diesel is actually a little better when it comes to CO2 and other greenhouse gasses, but worse at particulate emissions.