A man in a red shirt is standing next to a woman in a blue dress. They are both holding hands and smiling at each other. The nature of the hypothesized relationship is that there might exist a PM concentration level below which further reductions no longer yield premature mortality reduction benefits. Therefore, it is unlikely that reducing PM concentration levels will lead to a decrease in mortality rates. A group of people in orange walking in an event. They are participating in a charity run.
yes
no
no