Admiral Byrd the mason showing us what they iced over part of their plan to strengthen their illusion of evolution dinosaurs history ice ages and i think they froze these places when they patented the weather in the 1800s yes they patented and you only patent a product so im guessing before this the climate was temperate all year round and not iced over like they create the winters literally
Plus you dont need planes to deploy chemicals to alter the weather you can use airships or balloons and even some huge weather cannons were used and because we was always distracted we never noticed them always spraying making the weather