Human activities are not direct sources of a lot of ozone, but ozone concentrations increase to markedly unhealthy levels in many areas during the summer. About 30 years ago, atmospheric chemists solved this mystery.
There’s a dramatic recovery underway in New England. Red spruce, a tree species that researchers thought was doomed because of acid rain, is now growing faster than ever, and it’s not the only tree growing like gangbusters.
This week marks the release of the third National Climate Assessment (NCA). Issued to the President and Congress every four years, the report is a scientific analysis of how climate change is affecting our nation, including what we can expect in the future if the escalating problem is not addressed.
Another public health challenge the National Climate Assessment will explore is the likelihood that diseases native to other geographical areas will migrate to the United States as climate changes alter ecosystems.