Your car hit a pothole and there was a loud thump then a bad sewer smell in the car with no leaking or smoke evident so is there something wrong?
The Smell Would Not Indicate Any Trouble. If It Doesn`t Seem To Make A Strange Noise Or Steer Differently It Should Be OK. I Suggest You Have Your Garrage Put It On A Rack & Check It Out. Don`t Just Take It Anywhere Only Someone You Trust. Best To You The first thing that popped into my mind when I read this is the disgusting smell of differential oil, its possible you've damaged the rear diff. answer sounds to me like u hit the catalictic converter and damaged it the damage doesnt mean u have a hole in it, but a dent can mess up the insides of catalictic converter get under car and look to see if this is banged up.
Normally once someone feels the effects of sewer gas hydrogen sulfide /methane and other very highly carcinogenic fumes they are have liver damage and most likely some form of cancer or other dreaded diseases as many sewer gases are not detectable by smell thus by the time there is a diagnoses it is usually to late for the victim
What type of pollution is it when a sewer pipe is leaking from an apartment building and when a factory is dumping liquid waste into a river.?
Both the sewer pipe leaking and a company discharging liquid waste into a river are emitting water pollution. The difference is that the sewage is composed of sanitary waste (feces and urine), pharmaceutical waste from medicines taken and disposed of in the building, and food waste from food preparation. The factory could be putting out a wide range of chemicals, acids, alkalis, heavy metals, complex organics and solvents.