GeoEngineering is happening, but they call it an "experiment" at this time so they can deny it is happening. Contrails are not geoengineering as they are just condensation and ice crystals. However, for all we know, chemicals, invisible from the ground, may be dispersed simultaneously. You cannot experiment to determine the effects of aerosol injections without actually doing it at on a scale required to produce a result!
GeoEngineering is happening, but they call it an "experiment" at this time so they can deny it is happening. Contrails are not geoengineering as they are just condensation and ice crystals. However, for all we know, chemicals, invisible from the ground, may be dispersed simultaneously. You cannot experiment to determine the effects of aerosol injections without actually doing it at on a scale required to produce a result!