The law and its premise is nuts, lets just get that out of the way first.
"The intentional injection, release, or dispersion, by any means, of chemicals, chemical compounds, substances, or apparatus within the borders of this state into the atmosphere with the express purpose of affecting temperature, weather, or the intensity of the sunlight is prohibited," the bill reads.
So on one hand this is a reading about banning any efforts of geoengineering. But modern day airplanes already dump "chemical compounds" into Tennessee airspace today as part of jet engine exhaust. The argument would be "oh, planes are okay because they're not dumping to affect weather even though those gases are affecting the weather via climate change." Doesn't that argument open up license for anyone to dump whatever they want (including geoengineering materials) if they can claim that isn't their primary purpose?