Your dad wasn't brainwash as a child. Yes, weather changed, yes we have cooling off periods, and hotter periods.
I love how people bring up Australia - The hottest months in Australia are therefore December, January and February. Also Australia is Mostly desert or semi-arid- Wholly Molly it is a desert.
Global warming was debunk and now they changed the name to Climate change. 11,000 years ago the world was coverage in ICE, yes it has been warming up for the past 10,000. Is it do to the fact that we are all going to die in 12 years no.
There have been proving fact from NASA that they can not calculate the amount of snow, or ice in Antarctica because there is an increase of ice and snow.
Is this man made no, is it do to the fact that it is a scared tacit yes.