Just to be really really precise: while Snowball Earth periods were long, they did not last but a small part of the Precambrian.

The one Snowball Earth era we can be reasonbly certain about was maybe between c. 800 and 580, but certainly between 745 and 635 million years Before Present (BP), and was actually 2-5 successive Snowball Earth periods (e.g. freezing and thawing up), each a few to a few dozen million years long.

There is a hypothetised earlier Snowball Earth period 2.3-2.2 billion years ago. (The Earth is 4.567 billion years old.)

_{*Lunatic*, n.
One whose delusions are out of fashion.}

We do need - again - wider coverage for this kind of debunking. But it's particularly hard in the UK because the scientific culture here is so appallingly backward that it's a monumental effort to get people to consider the realities.

Most people who think about climate change at all are at the 'It's been a cold winter - so that proves there's no global warming' level.

I'd rather be more positive about it, but the reality seems to be that many people don't care, and the minority who might be interested don't get it because 'it's just a plot to make people pay more taxes.' (Sic)

Certainly in the debates I've had it seems to be impossible not to be labelled either a DFH or an old-style fist-waving Trotskyist just for taking climate change seriously at all.

Solution? None that I can see.