More BBC article excerpts: These aerosols have confounded climate models as scientists haven’t been able to accurately predict how many of the particles form. Now an international team of researchers say they have solved the chemical mystery by which the rich odours become reflective, cooling particles. They’ve long understood that the smell of pine, made up of volatile organic compounds, reacts with oxygen in the forest canopy to form these aerosols.
http://www.bbc.com/news/science-environment-26340038