Are you not going to answer about any of points about leather alternatives not being great for the environment?
since one of your concerns is global warming?
Sorry, curren, lot's of things going on home, ATM!
That's a fair point, and I don't know the answer. So I googled 'Leather versus the alternatives' and got thousands of results.
Here's just one, but there are many more.
I'm still unsure about the GW aspect. But when you factor in the inherent cruelty in the industry, alongside the human suffering caused, I'd still come out in favour of the man-made alternatives.
Thanks, jimpam! I was well aware of all the ill-considered judgements I would face, posting about this - so posts like yours are very welcome. 
I'm not perfect, by any means - I wear a leather belt (bought pre-vegan) - and I do struggle with the ethical dilemma of animal testing. Personally I think we do too much of it, but whether it should or could be done away with, I'm not sure.
We all (most of us) do what we can. I was a dedicated meat-eater for the first 64 years of my life, but now I think of the ethical consequences of everything I do. From flushing the toilet, to turning on a light switch, to buying a new gadget.
IMO, if people really think about the consequences of their actions, that's all one can ask for. If they continue wearing leather, for instance, after learning about the pros and cons, well, at least they’ve thought about it. That was my reason for starting this thread, really.
Peace and love, as Ringo would say!