In the 1990s, while still in high school, some scientific studies on this subject were published. Although I have been looking for them for some time, I have not been able to find them. The Paleoclimatic data that seems that if they have been accepted to elaborate models are the GISP2 of the year 2000. A very interesting graph.
Of course the media will only talk about news that supports theories for which millions are charged in taxes.