In reality, so-called 'chemtrails' are simple condensation trails, or contrails - linear clouds formed when water vapour from aircraft engine exhausts meets cold air.

This was a battlefront between very warm air in the east and cold air to the west.

Antarctic, as freezing cold air rushes down from the top of the icecap towards the surrounding seas.

But mucus thickens as cold air hits the upper airways, making it more difficult to expel the virus.

But despite these extreme conditions, the warm and cold air masses balance each other and make little difference to overall global temperatures.