Tell us about yourself!
That would only be necessary if those chemicals had a close ebulition temperature at the same pression as water. I don't know, maybe there is. The chemicals that are dragged by the rain, as you mentioned, were already in the atmosphere. I don't have knowledge of a chemical bounding to water, in which would mean a chemical reaction, but it would be no longer water, nor sharing its propertys.I do understand your point of view, there could lots of contamination sources, including the cup itself. But you should understand that evaporization means that the molecoles of water are free, not bounding to other chemicals. If some of those chemicals also evaporate, it would be minimal in comparassion with the salinated water.
I don't see why we should do that. The condesated water it's a clean one.
It looks prety cool. You only forgot to leave the grid with angle matching the sun inclination.
Hand Sewing Class