Well......to be honest .....this was the most anticlimactic thing in the history of all things anticlimactic .
...I mean, how often does ur ozone layer come down and kill most of the human population .....anyway back to the story......Those who weren't killed by the spheres of ice ...were killed by the pricing heat of the sun ...without the ozone there was nothing to protect us ....as they say .. everything has a meeting point so basically the uv rays of the sun showed us everything did have a melting point, the sun must've felt like some cool golden hipster at this point in time ...but that's not the main point the thing is that at this time more than 3/4 of the ENTIRE human population was gone ......and those that survived ...well...didn't really have that much time left ......they could take shelter ..but.....it'll probably melt down ...so there didn't really seem like anything could be done .....UNLESS .....