Overfishing is an obvious threat to our capacity to feed ourselves.
It's funny, but you never really think much about breathing. Until it's all you ever think about.
It's impossible to imagine what Australia would be like without surfing.
Humour's the pay-off for all that existential horror.
Nothing is as daunting as the threats associated with global warming. That's the biggie. Everyone bangs on about rising sea levels but the real challenge of a warming planet is ocean acidification. An acid ocean spells the end of life on earth.
I just sit here and tell the story as though I can't help it. There's always something in the day that reminds me, that sets me off all hot and guilty and scared and rambling and wistful, like I am now.