Question for Thomas Friedman: If China is really as "green" as you've been claiming for years, why are Beijing residents describing the air as “postapocalyptic,” “terrifying” and “beyond belief"?

Beijing Air Pollution Off the Charts - NYTimes.com

“This is a historic record for Beijing,” Zhao Jing, a prominent Internet commentator who uses the pen name Michael Anti, wrote on Twitter. “I’ve closed the doors and windows; the air purifiers are all running automatically at full power.”

Other Beijing residents online described the air as “postapocalyptic,” “terrifying” and “beyond belief.”