Crossbleed we can't burn as many lights as we like. Chimbu is spot on the money. Coal is the major source of electricity around the world.
"According to Greenpeace, coal produces over 40 percent of the world's annual carbon emissions. It's hardly a sundown industry. Between 1973 and 1993, global coal use rose by 36%. Coal burning exploded in Asia during those two decades, expanding 162%. Analysts predict Asia's coal appetite, mainly fed by Australia, will grow by 14 percent a year"
from this sight (did not search too long but i don't think the figures would be far off)..
http://www.ecoshock.org/2006/01/end-...rth-burns.html
Cheers,
R-S.