cloud shadows in the sky

:>>>Have you read this; Reports of black chem trails are being reported across the world, as users have begun uploading images and videos showing thick black smoke being emitted from aircraft in the skies above cities worldwide.

This new phenomenon was captured on video recently, and so far nobody has been able to explain what these black lines in the sky are.

In the video below you will see other chem-trails not making a shadow directly beside one that is making a shadow, so the theories about shadows cannot be correct.

***  The fact is, clouds cast shadows on the ground, not the sky, therefore, we do not see chem-trail shadows on the ground and we do not see cloud shadows in the sky.
They spray a line of black and then go directly over the line and spray with white, making a shadow effect! It is absolutely crazy!

What are they spraying on us, and why has it become black instead of white?

 Please do not say that it is a passenger jet because it is much too big to be a normal passenger jet.

http://awarenessact.com/new-black-chemtrails-reported-worldwide!/