Bark Beetle May Impact Air Quality, Climate - Science Daily
23 May 2012, 9:22 pm
They also indicated the increased presence of beta-phellandrene emissions correlated with bark beetle infestation. Beta-phellandrene is a volatile organic compound. Huff Hartz said the beta-phellandrene finding was quite unexpected and she intends to do ...

Beetle-infested Pine Trees Contribute to Air Pollution and Haze in Forests - National Science Foundation (press release)
23 May 2012, 2:19 pm
The predominant type of VOC released by trees was called ß-phellandrene. The data suggest that the bark beetle epidemic in the western United States could have led to higher concentrations of organic compounds in the air, which may contribute to haze.

Beetle-infested pine trees contribute more to air pollution and haze in forests - phys.org
22 May 2012, 6:52 pm
The predominant type of VOC was a monoterpene called ß-phellandrene. The data suggest that the bark beetle epidemic in the western U.S. could have led to higher monoterpene concentrations in the air that can contribute to haze, which can harm ...