It says, there will be earthquakes, rumors of wars...
Both could be encouraged by man made activity, like has anyone pondered what happens to oil wells, mine shafts, etc, when there is an earthquake, and all them resources have been extracted.
There will be a time like the beginning of the earth....
Could be because global warming goes haywire, as we're starting to see, and there is mass displacement of people due to flooding, hurricanes, etc.
It says, if those days had not been shortened, none might be saved....
Clearly God steps in to save; why bother if God caused it?
Not sure either, and sort of decided trying to predict the future by reading prophecy, is a dangerous venture half the time; as even when prophecies have been fulfilled, they don't often match how you might expect them to be fulfilled on reading them.