Over a dozen studies have found significant associations between various measures of long-term exposure to PM and elevated rates of annual mortality (e.g.
Studies have found associations between long term exposure to PM and elevated rates of mortality.
There is no correlation between PM exposure and mortality rates.
The man is jumping on the ramp.
The White House received this in person.
User behavior is more emphasized in the guidelines.
Jon and Susan entered when the sun came up.
Many people have luggage.
A pneumatic or mechanical conveying system is part of the definition of a metering valve.