A national action plan corresponding to the United Nations Decade on Biodiversity was issued in June 2012 during the first conference of the China Biodiversity Conservation National Committee, hosted by then-vice premier Li Keqiang.

All 363 State-controlled nature reserves by 2012 are monitored by environmental satellites, so that illegal tourism development or construction within the reserves can be spotted and supervision departments can take further action. Such remote monitoring activity covered only 230 nature reserves in 2011.

The biggest environmental issue in the past year has been airborne pollution. Based on the air quality standard issued in 1996, more than 91 percent of the 325 cities met the standard in 2012, higher than the 89 percent in 2011.

But the passing rate would be less than 41 percent if the nation's updated standard, currently scheduled to take effect in 2016, were adopted to evaluate air quality today.

The new standard, issued in February 2012, set three more indicators to assess air quality in addition to sulfur dioxide, nitrogen dioxide and particulate matter: fine particulate matter, carbon monoxide and ozone.

Readings of these six indicators from about 500 monitoring sites in 74 cities have been made public since January. The new standard will be implemented nationwide on Jan 1, 2016.

The international theme of the 2013 World Environment Day is "think, eat, save". Considering the country's most urgent priority is pollution control, the national theme is set as "breathe the same air, work hard together", as Premier Li Keqiang said during his first meeting with reporters in March.

"Since we breathe the same air, we should work hard together," Li said when answering a question about airborne pollution.