Yep. Just like propane. The additives are there to help people notice if there’s a leak.
Just because we can’t smell it, doesn’t mean that methane producing microbes can’t.
Put a tiny drop of t-butyl mercaptan underneath somebody’s front porch and watch the fun begin.
That was one of the things I was worried about after I had 3 operations on my sinus cavity back in 2008. I couldn’t smell anything! For about six months I had no sense of smell at all. The doctor said I had a 50/50 chance of ever getting it back, and at the end of 6 months it began to return, slowly. Things I could smell were different than before the operations. My brain had to re-wire itself to recognize these ‘new’ smells so that I could know what it was. My favorite after shave and colognes were all ‘different’ than I remembered. At first I thought they had gone stale, so I threw them out and bought new. They smelled the same as the ones I threw away. After about a year I had full sense of smell but the smells were totally different than before. Even bacon smelled different, as did other foods. But now, after 7 years, I can smell almost everything like I used to but have had to adjust to the differences.....................