This could explain the light conditions.
http://blogs.marketwatch.com/thetell/20 ... vironment/
....Puzzled global warming enthusiasts have been perplexed about why global temperatures haven’t cooperated by rising over the past 10 years.
Now a new research study suggests it’s all because China’s been burning lots of coal, especially the dirty kind that generates lots of sulphur, as Reuters reports.
Atmospheric sulphur apparently helps in the formation of hazy clouds that in turn reflect sunlight back into space thus offestting the effects of a rise in so-called greenhouse gases that would normally trap more heat in the atmosphere....
‘Dirty’ coal is good for the environment, cooling
Moderator: Chip