It's hard to say how much of that is the government, because federal projects are not required to report it. We do know that many private companies are actively doing what they call weather modification. They're required to report it to NOAA:

NOAA Library: Weather and Climate Collections: Weather Modification Project Reports

NOAA Library: Weather and Climate Collections: Weather Modification Project Reports

the forbidden noticing of chemtrails has been rebranded with the public acknowledgement of weather modification.