China’s smog has gotten so bad, it’s almost impossible to see skyscrapers from the air

Some areas of China are experiencing some of the worst levels of pollution.

As of Wednesday, Beijing was under a “red alert” for smog — the highest of four levels — and a “yellow alert” for fog. Other areas, particularly in northern China were still under red alert as of Wednesday for both fog and smog.

This photo, by CNN chief national security correspondent Jim Sciutto, shows just how insane the smog has gotten, enveloping the capital so much that just the tops of the buildings can be seen.