This object is on a remote island called French Southern & Antarctic Lands. There's no cloud that is coloured like that and it can't be pollution because there are not factories or anything else that could cause smog in this place. It can't be a bush fire because the place is very cold all year around, which doesn't create to conditions to start a bush fire.
Guitar solo by Peter Edvinsson. You can find the guitar tabs at my site on the link http://www.capotasto music.com/guitar_pag es/resources/guitar_ peter/blue_clouds_gu itar_tab.htm