With the right partner, kids (depending on how you see it) make you work less,(if you decide to take time to help them grow) enjoy life more (hilarious situations) and grow as a person (suppress your ego)
The good thing is they grow up fast and are the closest thing to positive change we can potentially actively have a hand in... also according to book quoted on HN the upper limit of human population is 1 trillion... so all we really need to do is work less, stop useless packaging and wasteful bureaucracy, enjoy life more and eat better by transforming the junk food (glucose syrup, wheat, rye (beer u and meat agriculture into a refugee(from work) based garden of nuts fruits and veg
Try watching a french film called Demain (Tomorrow) ...plenty of immediate great solutions out there