For those of us who like collecting doomsday scenarios, here's another one. It's the low earth orbit collision cascade as seen in films like Gravity.
https://en.wikipedia.org/wiki/Kessler_syndrome

The usual entertaining comments in this RFC about the likely social effects of a 2030 Kessler event..
http://www.antipope.org/charlie/blog-static/2015/09/the-skys-gone-dark.html