You are trying to simplify something that is not simple. For one thing the planes are unmarked. Climate change involves a lot of things and these planes are a minor part of that. Climate change is happening for many reasons that have nothing to do with people. It's part of Earth's natural cycle, as is the rise in carbon dioxide levels. But you would have to do a lot of research, as I have, to know this
But I'm not here to debate climate change or chemtrails. I'm not here to convince anyone of anything, everyone is free to believe what they want to believe. If this site has members from many countries then there must be a few from Japan who can answer my question. I'd be happy to hear from anyone in China or Russia as well, with an answer to the same question.