Toxic skies over Beijing

Toxic levels of smog that go far beyond the standards acceptable by the World Health Organization over the skies of Beijing.

And there's no sign the smog is clearing up.

China's environment ministry vows to be heavy-handed, saying they'll "harshly punish" factories and power plants that contribute to the hazardous conditions.

For the first time on Friday, Beijing raised he pollution alert to the second-highest "orange" level.

Official government monitors have measured the the level of PM2.5 particles at over 400 outside.

The WHO recommends a number around 20.

Which is what the air inside these smog domes at the Western Academy of Beijing is reading.

It allows the kids to play sports, where otherwise, the skies over this outdoor soccer field aren't visible.

But Beijing international schools with such smog domes cost a pretty penny.

They use HEPA filters and cost around $1.8 million dollars to run, per month.

The Director of the