SPOILER - frustrating we didn't ever find out...

It was from people arguing on the interwebz.

The way we are going it could be the combination of many things.

It was my impression it was climate change.

Wasnt it because of Brexit?

Probably tried to "fix" the weather like in the begining of snowpeircer and then it backfired... lol...

They never say...

Makes it more realistic that way. How many times in life did you never get an answer?

Ever have a car stolen? Ever see it again?

Ever been wrongly accused of a crime? Did you get your apology in section A of the Sunday paper?

It looked pretty exploded and they were measuring airborne radiation?

I do believe this was the result of Bill Gates attempting to block out the sun to prevent "climate change". Instead, it actually created a real crisis by self-replicating radiation across 99% of the globe.