Google geoengineering!!! Do your own research on this subject we all blatantly see skies like this a lot!!! These are not contrails and it is not natural!! Look up and Wake up!!!
A contrail is made by a plane and disintegrates within in two minutes. These chemtrails (lines in the sky) can sometimes last for hours, criss crossing, grids in the sky. While they are up high they look like dark white lines. Then they spread wider. Next they cover the whole sky, until it is completely overcast. I beg you to do some research into geoengineering. It affects all of us and this is only one of their many ways to dumb down the people and pollute this beautiful planet.
Further research >>> http://www.chemtrailsprojectuk.com/evidence/videos/