Does anybody still think chemtrails are a conspiracy theory?

It would seem that the UK government thinks that geo-engineering programmes require regulation.

http://www.publications.parliament.uk/pa/cm200910/cmselect/cmsctech/221/221.pdf

So what do you think?
Are ‘chemtrails’ a conspiracy theory?
Are western governments trying to prevent the next ice-age from occurring by praying solar radiation reflecting particulates into the atmosphere?
Or do you look up at the clouds everyday and think, “nope, nothing unusual there!”