Talk up thread of one child per couple got me thinking.
I'm not an economist, so I could be wrong, but I have the impression that the economies of the developed world are currently based on the need for permanent growth.
If this is correct, it's hard to imagine what would happen if the world population actually began to fall, instead of increase.
Even on a small scale, for example just the UK, the short-term effects could be catastrophic couldn't they? We already have an aging population, which is causing huge problems. If the number of younger people was to suddenly fall dramatically (either through falling births, or the loss of young, tax-paying immigrants), the effects don't bear thinking about!
This doesn't alter the fact that the world's population does need to be addressed, or that I don't think we should do anything about it - simply that there is probably no simple solution that won't impact on the existing population i.e. us.
I feel increasingly concerned (rather than stressed) when I think about where we are at, and do what I can in my own little way to limit the harm that I do to our planet, but I think it will take a whole lot more than some of us doing that, to keep our planet inhabitable.
IMO, only big, global measures can do anything to stop, or better still reverse, the rot. For that reason, I support what the protesters are doing to draw attention to the issue (though obviously I feel sorry for those affected by it). It will take drastic measures to bring about effective change.