Australia is a huge continent, but only a small proportion is arable: most is desert. Creating mountains in just the right places could increase rainfall.

But I don't think even the most powerful atomic bombs built so far are sufficient for this modest engineering proposal.

EDIT and why would a hack like this get downvoted?

http://en.wikipedia.org/wiki/Nuclear_pulse_propulsion

This is the only way we have right now of traveling at speeds anywhere close to c.

Mount Snow in Vermont wanted to use a bomb to create a back bowl for skiing in the 60s.

http://books.google.com/books?id=FOhrjSuy6rsC&pg=PA49...

This is hardly a new idea; the Soviet Union did this for real many times:

http://en.wikipedia.org/wiki/Nuclear_Explosions_for_the_Nati...