McClatchy Newspapers: While Olympic visitors from around the world get a firsthand glimpse this month at China’s pollution problems, a homegrown movement is racing to ward off what many here predict could be epic environmental meltdown. Hundreds of millions of Chinese are taking the first steps to turn the tide, fueled by growing unhappiness with the plunging quality of life caused by out-of-control environmental degradation. Industrial districts such as Zibo in coastal Shandong province are closing …