In article
,
JG wrote:

Once again I'll stick with UCLA scientists

Scientists-for-hire are a dime a dozen. Sometimes literally.

vs. GA shills, but thanks for playing.

"The study, released Wednesday, shows that ultrafine particle
emissions were 10 times higher than normal

Define "normal".

Compare it with levels for drivers stuck in daily commute traffic in the
L.A. basin.

about 300 feet downwind of
the runway's east end, where takeoffs generally start. The levels were
2.5 times higher than normal at a distance of about 2,000 feet.

A tiny fraction of the width of a human hair, ultrafine particles can
travel deep into the lungs, penetrate tissue and even travel to the
brain. Studies show that elevated exposure to the particles presents a
health risk for children, older adults, and people with respiratory
and cardiovascular diseases."

The which has been known for the better part of 60 years. Emissions from
GA aircraft are neither something new, nor a significant fraction of
total manmade particulate emissions, not even in the L.A. area.

Once again, how about those commute hours?

Mr. Rubin can go on at length, but that's his job; his employers should
expect no less.