Narrator: This is Science Today. It's been
found that the more pollution particles there are
in the air, the more people are getting sick with
asthma and other respiratory problems. So, the Environmental
Protection Agency recently issued new rules to control
the levels of these small particles to protect human
health. Lara Gundel, a staff scientist at the Lawrence
Berkeley National Laboratory, is zeroing in on fine
Gundel: The question is, what's causing the
health problems? We want to know what the composition
is, how does it vary from one part of the country
to the other and then how do those differences relate
to health effects?
Narrator: To do this, Gundel developed a
novel way to separate gases and particles by using
an air sampler with a sticky coating inside the
Gundel: The particles just go off and are
collected on a fabric and measured later in a filter
like a vacuum cleaner bag. The aim is to get accurate
measurements of particle mass and number and accurate
determination of the composition.
Narrator: For Science Today, I'm Larissa Branin.