Dr Swan has warned that if the current rates of sperm count continues at the present rate, humanity will hit a count of zero by the year 2045.
It's a fascinating article but I simply can't imagine this ^ happening, and so soon.
Maybe it will, and it's people like me that are the problem, and by the time we wise up it'll be too late.
I think we as humans are definitely going to be responsible for our own extinction, there is so much that needs to be done, such a drastic change in our behaviours and lifestyles to prevent it, that we can't and/or won't do it and that'll be the end of us.