The video which I listened to was the Lord Martin Rees podcast on climate change. One thing that I found interesting was his concession that the difference between what's possible and what's realistic are two starkly different things. He talks about the means by which people's pollutive habits could be reduced down to net zero by 2050. However, he also says that these practices do not take into account all of the legislative hurdles and red tape that tend in the way of these practices. I found it refreshing for someone to be forthcoming about how realistic these hopes are as opposed to using the sometimes blind optimism that others do.
I would have loved if this discussion got into a bit more of an in-depth discussion of uncertainty. This i touched upon a bit in at least one question that's posed. However, I think uncertainty is one of the keys to understanding the climate's change. Additionally, I'd love to get a sense of how and why an expert like him thinks that symbolic "goal posts" of prediction have been moved many times as the climate change issue has developed in recent times. It seems that targeted years in which things have to happen continue to be pushed back and it would be inciteful to hear Rees speak more to how these things evolve as well as the solutions to these problems evolve.