I'll reply here rather than off-topic on the Malcolm Turnbull thread.
The most hilarious thing I've seen so far from Climate denialists has been their latching on to the sunspot minimum story.
The flavour of the month earlier this year was "See - it's all due to the sun!'
It somehow escaped them that er sunspots are associated with greater solar activity, not less. Less sunspots should be associated with a drop in temperature, not an increase (check the Maunder Minimum)
Of course when the penny drops, there is the usual embarrassed silence, and then they start rambling on again about monthly temperature figures or something totally irrelevant again. Collectively they seem to have this short-term memory loss.
It doesn't matter how many times they have been burnt down by the flames of reason, they seem to go on rising from the ashes in a Phoenix like manner, time and time again.