Water vapor that is produced from friction off of aircraft is obvious in that it disperses quickly and "disappears" like warm air out of cold car exhaust. Rest assured that these planes are indeed" crop dusters" and we are to be "exterminated'. I saw "one" blue sky in the last year that wasn't polluted with chemtrail  " dispersals". Each individual has a point where their bodies can absorb or accumulate hazardous materials. When that level is exceeded, organ failure and cancer set in. These nafarious villians know that . If you follow an oil burning car long enough, you are going to get carbon monoxide poisoning..it's called" lethal exposure".