CCTV

Chinese man wears a protective face mask as he passes by the CCTV building on a day of heavy pollution on November 30, 2015 in Beijing, China. China's capital and many cities in the northern part of the country recorded the worst smog of the year with air quality devices in some areas unable to read such high levels of pollutants. Levels of PM 2.5, considered the most hazardous, crossed 600 units in Beijing, nearly 25 times the acceptable standard set by the World Health Organization. The governments of more than 190 countries are meeting in Paris this week to set targets on reducing carbon emissions in an attempt to forge a new global agreement on climate change.

Kevin Frayer/Getty Images

Chinese man wears a protective face mask as he passes by the CCTV building on a day of heavy pollution on Monday in Beijing, China. China’s capital and many cities in the northern part of the country recorded the worst smog of the year with air quality devices in some areas unable to read such high levels of pollutants

A ragpicker walks past a poster showing Beijing's central business district, next to the CCTV building in Beijing...A ragpicker walks past a poster showing Beijing's central business district next to the China Central Television (CCTV) building outside a construction site in Beijing, October 21, 2014. It is still taking time for reform measures to gain traction, Chinese Premier Li Keqiang was quoted as saying by the Foreign Ministry.

Jason Lee/Reuters

A ragpicker walks past a poster showing Beijing’s central business district next to the China Central Television (CCTV) building outside a construction site in Beijing

REUTERS PICTURE HIGHLIGHT...ATTENTION EDITORS - REUTERS PIC    PEK703  A man works on a security camera which is installed at Tiananmen Square in Beijing.  REUTERS/Kim Kyung-Hoon

Kim Kyung-Hoon/Reuters

A man works on a security camera which is installed at Tiananmen Square in Beijing