[coloradan]

"It is now clear that human (activity) has become dominant over the natural variability."

BS! Humans haven't caused things quite like ice ages, of which there have been many.

[new cruelty]

"The human activity chiefly responsible for warming is the emission of carbon dioxide through the burning of fossil fuels like oil, coal and gas, scientists believe."

re: asian brown cloud:

http://www.google.com/search?hl=en&lr=&ie=UTF-8&oe=UTF-8&q=asian+brown+cloud