Senator DI NATALE (Victoria—Leader of the Australian Greens) (14:31): I'll ask the minister a simple question that I asked of Minister McKenzie yesterday, and I'd like the minister's opinion on it. Do you agree with the simple proposition that the single biggest cause of climate change is the mining and burning of coal, and that climate change will increase the frequency and severity of bushfires? It's a very narrow question—no mealy-mouthed response. I'm asking whether you agree with that simple and straightforward proposition.