Have you lived long enough to see it go up and down?
https://en.wikipedia.org/wiki/Global_surface_temperature
You can see this is not a cyclic issue.
Or atleast not a cycle shorter than couple thousand years.
alt Hacker News
https://en.wikipedia.org/wiki/Global_surface_temperature
You can see this is not a cyclic issue.
Or atleast not a cycle shorter than couple thousand years.