The effect and proof of climate change is obvious for all to see, wondering why people ar still skeptical about climate change.
According to wikipedia it is the Climate change is a change in the statistical distribution of weather patterns when that change lasts for an extended period of time. This is real and obvious in our society.
By it's very definition, "Climate" is three successive ten year histories.
So suppose you have these decades. 1950, 1960, 1970, 1980, 1990, 2000.
Using statistics, you define climate for 1950-1979. You can then discuss "climate change" relating to the period 1960-1989. That's assuming you don't have cooked or slanted data.
By it's very nature, the effect and proof or lack of effect, and lack of proof, is HISTORICAL.
It's not "obvious for all to see." Quite the reverse.
What you are referring to is things like the hot day in August, when the media blitz talks about the "unprecedented heat wave." You are talking about propaganda, pure and simple.