Dr. Polya, 
Near the end of this article you state, "The US is (now with China) the world’s top greenhouse gas (GHG) polluter but has over 4 times the Chinese population; it refuses to sign Kyoto; and it uses about 15% of its grain for biofuel in a world in which two thirds of population is malnourished." 
I am wondering how the U.S. has 4 times the population of China? I would like to know what you meant to write.