A Dutch artist and designer has come up with a device he hopes
will suck pollutants from Beijing's smog-cloaked skies, creating
columns of clean air for the city's surgical-mask wearing
residents.  An electromagnetic field generated by copper coils
will pull airborne particles in the smog to the ground where
they can be easily cleaned.  "It's like when you have a balloon
which has static (electricity) and your hair goes toward it.
Same with the smog," says artist Daan Roosegaarde.  His studio
has reached an agreement with the Beijing government to test the
technology in one of the capital's parks.  With its skies
regularly shrouded by filthy gray smog, Beijing this week
unveiled a series of emergency measures to tackle the problem.
Roosegaarde says an indoor prototype has already proven it works
and is confident the results -- with the help of a team of
scientists and engineers -- can be replicated outside:  "Beijing
is quite good because the smog is quite low, it's in a valley so
there's not so much wind. I