If you check the battery its physical size is not much of a problem. Can fit into a 4.2" screen chassis. If not, they can make the phone 1mm or 2 thicker, not big deal. Dont you think?
Still dont get why manufacturers cant put all the good stuff found in the big screen versions into these, more wearable, 4"ish designs. They will make money anyway. I hate the size of my S3.
Sadly, either we take care of our population levels by any method or the world will adjust by itself. The world has a population carriage and as any ecosystem, can sustain life up to its limits. So will be either human control or nature control caused by the accelerated degradation of the world ecosystem that will lead to more storms, droughts that will decrease food, etc. etc.
We are part of the nature and the nature will do it’s job as been doing for millions of years. Nature never takes a day off.