How is gust caused?

That depends... How what was what caused? We can't answer you if we don't know what the heck you're talking about! Please tell us what.

Smoking

I think it may be caused by CTLs

The current scientific theory for the beginning of our universe is called the Wave Function of the Universe, a theory developed by Stephen Hawking, Andre Vilenkin, Alex Linde and others. It says that...