This will neutralize acids which may form and cause a bad smell.

VOA: special.2009.06.23

We actually--We need to step back and ask questions like and these are questions we're going to ask Why does poop smell bad?

事实上，我们需要追溯,问一些问题,诸如我们打算问,为什么大便闻起来不好？

耶鲁公开课 - 心理学导论课程节选