There’s a conspiracy that long white trails left by high flying jet aircraft are in fact full of chemicals, biological agents or even microchips - designed to control or medicate the population. They’re called “Chemtrails”.

Some people even believe Governments use jet aircraft to control the weather, making it storm on demand.

They even say the Chinese government controlled the weather to make the opening of the Beijing Olympics dry.

But what exactly are Chemtrails? Is it just harmless aircraft vapour or something more sinister?

Richard Saunders is a lifetime member of Skeptics Australia