I don't know what Dr. Carter's position is on chemtrails.
I do know that global warming is the "crisis" that is intended to justify geoengineering ("chemtrails"). Without global warming, there is no justification for chemtrails.
There is a lot of talk about the "risk-to-benefit ratio" of geoengineering. When we finally recognize that global warming does not exist, then the "benefit" goes to zero.