Just think of all the methane and CO2 those big dinosaurs produced! And I sincerely doubt that they had proper emissions controls on every volcano! I'm sure glad the econuts at that time were able to take control and get a nice big ice age back!
The fact that trees were growing before the ice came confirms again that weather is cyclical and that no one truly knows what is driving the weather patterns.
Inconveniently, "Inconvenient Truth" has been banned in Britain because of shoddy or blatantly wrong "scientific" reasoning or evidence!