If you hear the words "climate change" and you begin to drift away, you're not alone.
It's called "climate fatigue", the idea that the challenge is too big, too difficult to comprehend, too scary so you just switch off.
So how do you communicate the urgency of the climate crisis without overwhelming an audience?
That was best selling Icelandic author, environmental campaigner, and former presidential candidate Andri Snaer Magnason's challenge when he set about writing his book, On Time and Water.
He sat down with ABC NewsRadio's Tom Melville.