Why is it that during changing weather, one is advised to avoid closed, crowded and air conditioned places like cinema halls etc?

Why ozone is used in improving the atmosphere of crowded places such as cinema halls, tube railway, etc.?

During an incident of fire , one is advised to wrap a woolen blanket over a burning object. Explain why?

Explain why are you not able to breath normally when you are in closed and crowded places ?

Explain why cis and trans isomers do not change into one another under ordinary conditions?

A wet porous substance in the open air loses its moisture at a rate proportional to the moisture content. If a sheet hung in the wind loses half its moisture during the first hour, when will it have lost 95% moisture, weather conditions remaining the same?

A wet porous substance in the open air loses its moisture at a rate proportional to the moisture content. If a sheet hung in the wind loses half of its moisture during the first hour, when will it have lost 95% moisture, if weather conditions remain the same?