Source: https://www.youtube.com/watch?v=M_MZplILp4w
This is a long discussion I had with Patrick Roddie, who firmly believes that the government is engaged in a secret geoengineering program with "chemtrails". Patrick runs a web site StopSprayingUs.com, and frequently appears at chemtrail/anti-geoengineering events.
We start out talking about the physics of contrails, then move on to the problems of sampling for aluminum, satellite images of clouds, halos and sundogs, and geoengineering proposals
The conversation was recorded on Jan 10th 2018.