"Was there not episodes of climate change before the industrial revolution? I think the answer is yes. What do you blame those on ?"

Who's blaming them on anything?

"the change is driven primarily by natural and non-anthropomorphic causes- The amount of greenhouse gases produced by mankind and our civilisation ( cows, etc) is dwarfed by natural causes such as volcanoes and naturally occurring fires"

So BB is more of a climate scientists than most of the climate scientists out there? Hmmm. This argument is based on personal incredulity and perhaps has political motivation but either way; the facts, empirical data scientifically obtained and subject to strict, peer-reviewed analysis does not support the argument than vulcanism and carbon emissions from natural fires are warning the climate - post refs to papers supporting these assertions if they exist.

Truth is, the deniers (who are science deniers rather than climate change deniers) are talking to themselves. My uni dept. specialises in ocean and earth science and the argument of whether humans are causing climate change is settled, consensus has been reached and we are now some years into trying to understand how climate change is happening, the consequences of that change and how to mitigate for the effects.

It's actually worse than most people think. The effects of a warming climate on the ocean are profound and very far-reaching. We know some mass extinctions correlate with changes in sea level and changes in plankton at the base of the food web has a pronounced knock-on effect reaching to the top of the food chain.

The real truth is no-one wants to change. Our free-trade based economies view everything as a resource with a price; they are incapable of understanding (or caring about) the long-term consequences of their actions and are incapable of self-regulation. They are responsible for stripping the world of it's natural resources, instigating a massive and unprecedented mass extinction event and fail to act for the common good.

Believe me, our children and grandchildren will curse us for our ignorance and greed and for squandering our natural heritage before we have even scratched the surface of it's wonders; who knows what medicines are being lost as virgin forest is felled for palm oil plantations or beef for burgers.