A mix of factors is contributing to an increasing mortality rate of trees in the moist tropics, where trees are dying at about twice the rate they were 35 years ago.
Tiny particles fuel powerful storms and influence weather much more than has been appreciated, according to a study by PNNL scientists and colleagues in the journal Science.
This time of year finds many of us busy with holiday shopping. While PNNL might not be developing the latest video games or hoverboards, we are working hard to deliver a few presents you might like.