In this Thursday, March 7, 2013 Chinese traffic policemen closed off a road for delegation buses attending the annual Chinese People's Political Consultative Conference held in Beijing, China. Facing public outrage over smog-choked cities and filthy rivers, China's leaders are promising to clean up its neglected environment, a pledge that sets up a clash with political pressures to keep economic growth strong. (AP Photo/Andy Wong)

Associated Press
In this Thursday, March 7, 2013 Chinese traffic policemen closed off a road for delegation buses attending the annual Chinese People's Political Consultative Conference held in Beijing, China. Facing public outrage over smog-choked cities and filthy rivers, China's leaders are promising to clean up its neglected environment, a pledge that sets up a clash with political pressures to keep economic growth strong.  (AP Photo/Andy Wong)
In this Thursday, March 7, 2013 Chinese traffic policemen closed off a road for delegation buses attending the annual Chinese People's Political Consultative Conference held in Beijing, China. Facing public outrage over smog-choked cities and filthy rivers, China's leaders are promising to clean up its neglected environment, a pledge that sets up a clash with political pressures to keep economic growth strong. (AP Photo/Andy Wong)
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