Cusco Peru has been known to have UV25 - obviously altitude plays a large part but it's not as high has the one I linked above. Above is actually a snow covered mountain so that might explain why it's much higher than surrounding locations.
I read that, following a nuclear exchange, the soot ejected into the stratosphere would create super-warming there, destroying the ozone layer.
UV index values across most of the world would be at/over 35.
Home: St Helens (26m asl) Work: Manchester (75m asl)
A TWO addict since 14/12/01
"How can wealth persuade poverty to use its political freedom to keep wealth in power? Here lies the whole art of Conservative politics."