Right now humanity is facing some bad times due to CO2 in our atmosphere trapping excess heat from the sun.

Presumably, a civilisation that was Type I on the Kardashev scale would be capturing all the available solar energy coming in to their atmosphere on purpose and using it to perform some function. But some of that energy would inevitably be transformed into heat due to no technology being 100% efficient.

So, wouldn't a civilisation face catastrophic climate change really before they even got to be a fully Type I civilisation?

In the first Austin Powers movie, Dr. Evil steals a 50 kiloton nuclear weapon, straps it to a drill and is going to fire it into the mantle to trigger volcanic eruptions world wide.

My instinct is that, compared to a lot of nuclear weapons in the megaton range, 50 kilotons is not really a lot, and using it to try to move rock (even molten rock) is not going to accomplish his goal. Would it even cause a measurable change in the pressure that far down?

I don't know why I could be thinking of this lately.

The beer's actually brewed in Toronto, but it's the best I could do.