“Irreversible”? Baloney. The ice has melted before, and re-frozen. It will do so again - no matter what Al Gore does or doesn’t do.
OK, so if ice never melted before why are we not living in the Ice Age?
Exactly. It is why the ice melted during what is commonly known as the “ice age”. It is a normal cycle of the planet that has now been politized for profit to scare and demonize anyone not smart enough to understand.