When it comes to managing crocodiles, we are learning that it is actually more important to manage people. Learning how to keep people safe from crocodiles will ultimately protect visitors to croc territory as well as the crocodilians themselves.

Crocs are apex predators, and as with all apex predators, they are critical to the environment: if you lose the crocs, you'll lose the barramundi, you'll lose the crabs - a catfish can eat 30,000 barramundi fingerlings, and who do you think eats the catfish? Crocs.

Never walk past a problem with an animal - fix it.

It pays to be in the best shape possible when you're wrangling the largest reptiles on Earth!

Forcing companies to recruit away from the golf course might lead to the appointment of more women from NGOs and academia and medicine, all of whom are likely to understand such concepts as stewardship and sustainability much better than men picked from the usual hunting grounds.

I'm at one with Ed Miliband in saying that it's important that people have the right to express their democratic voices and also their deep concerns about climate change because we have a planet in peril.

I have to say that if our global alliances are going to be alliances with Hezbollah and Hamas and Hugo Chavez's Venezuela and Vladimir Putin's Russia, there is absolutely no chance of building a world-wide alliance that can deal with poverty and inequality and climate change and financial instability, and we've got to face up to that fact.

It is fairly well-known what has been behind that climate change denial in America: vast sums pumped into an ignorance industry by the oil and gas lobbies.