Sun blocked again by Homogenitus (man made) cloud. Very few people notice or seem to care.

Most days I see the same thing. Blue skies in the morning gradually becoming white as the day goes on as aircraft trails spread to form haze that blocks the sun. I've tried asking the UK Met Office about this but they refuse to answer my questions, the main one being, "How much of the cloud we see in the sky is man made?"

I suspect the reason they do not answer my question is because the answer would be too uncomfortable.

When was the last time you saw a deep blue sky and a yellow sun?