We live in a world where equality is pretty important.

Your personality as the prime minister feeds through to what you emphasise, and what you don't, how you'll handle a situation - whether you've got the combination of intelligence or instincts to adapt and to make good decisions.

New Zealand needs to balance its environmental responsibilities with its economic opportunities, because the risk is that if you don't do that - and you want to lead the world - then you might end up getting unintended consequences.