Today, Singapore’s haze situation became more focused as the PSI notched above the 310 range. I was walking in the street when the PSI was around 316 and I was choking as I breathed in the polluted air. Near me were a group of young folks, playing soccer in a basketball corner, oblivious to the haze and the possible effects that it would have on them. The PSI today would be the highest PSI to date for Singapore and I still remembered the PSI of Singapore reached 401 in June 2013, the highest PSI for Singapore to-date.As a result of the high PSI, primary schools and secondary schools will be closed tomorrow. For the Singapore Stocks Markets, it will still be open and it will be interesting once again to see whether the PSI will drive up Medtecs International stock, the company behind N95 masks once again. It was ......