Other: I boarded your bus #1372 at about 7:22 AM heading East on the #3 route this morning, February 16, 2024. I noticed the strong presence of diesel exhaust fumes on the bus & notified the driver. He informed me that that was just the way it is. I told him that I ood not think that we passengers are supposed to be breathing exhaust fumes. He said that it is a normal part of the regenerative process. I explained to him that we are not supposed to be breathing in exhaust fumes. I asked him if he should radio the issue in to dispatch. He explained that there was nothing that he could do about it, that it was a normal part of the regenerative process. When I arrived home & called dispatch, I was told the same thing. Tehn when I was still concerned that this was not supposed to be happening, she passed me onto her boss. I then was also connected to a man in dispatch. He too told me that it was a normal part of the regenerative process. I then asked him, so, you are supposed to be breathing in exhaust fumes while on the bus? Only then did he say that he would have maintenance take a look at it. However, I have heard this before & they have in the past disregarded this concern & let the bus run with exhaust fumes. I do not beleive that we tax-paying citizens should have to put up with busses gassing us like we are in a WWII Natzi Contentration camp getting gassed becouse our lives do not matter. There is never an excuse to expose a passengers to this and in fact, upon being notified by a passenger, the driver should have to pull the bus over, empty the bus of passengers to prevent carbon monoxide poisening & have us wait for a bus replacement or for the issue to get fixed, before reboarding a bus. I have sent a letter to the EPA about this going on for 20-years as I can recall & treating pasengers this way, as though we should not have an issue with disel-exhaust fumes being inhaled into out lungs while riding as a passenger.