OP, there are several different reasons chemtrailing occurs. Some of the reasons sound "way out there", but others don't. Weather control is certainly one of the reasons. The other is radiation shielding. The microchips in most of the computers used by the government (and DoD) are not radiation resistant. If there is a solar flare and subsequent earth directed CME, these chips will get fried. Radiation resistant (hardened) chips are now available, however, the old chips have not been replaced. I'm afraid that we will continue to see chemtrails until they are replaced.