The reason they changed it to climate change was simple, because smart people realised it's a load of horse sh1t and even dumb people were starting to ask questions when many of their predictions started to fail. By changing the name to climate change, they could cover up their embarrassing predictions of doom and gloom and ensure the money kept flowing in for their pet projects. This way they cover it every way, wind events, bushfires, even volcano eruptions FFS and they can blame everything on climate change.
Pick something obscure like volcanos, sinkholes, almost anything and google it with climate change, you'll find some nutter blaming the cause on climate change.