I don't know, but I would reject all anecdotes. If somebody measured the temperatures around the world for many decades, I could accept that shows global temper

I don't know, but I would reject all anecdotes. If somebody measured the temperatures around the world for many decades, I could accept that shows global temperature rise. Turns out they did and I do. That's data, not anecdotes. As for proving the cause, I don't know enough to understand how reliable that is. But climate scientists seem pretty sure of themselves so I accept their conclusions as much as any well studied science conclusions.