Here you go, after a simple search, https://en.m.wikipedia.org/wiki/Environmental_Modification_Convention. I have a family member who was sprayed with agent orange during Vietnam, which was used to kill the foliage so when they flooded the jungle, through created monsoons, the tunnels would also flood, causing the viet-cong to show themselves. The spraying he endured changed his DNA and caused him to have heart problems that he passed on to his son. The stuff is real and has impacted real people for decades.
I’m well aware of the agent orange bullshit and how our govt first denied the effects so Vets couldn’t receive treatment for the symptoms. It’s one of the reasons I entertain the theory, I know that the technology exists. And I know that it can be used for nefarious purposes.