Forest Service lichenologist Sarah Jovan hardly has to walk half a block from her office in downtown Portland to find the type of shaggy, green moss she used to discover the city's hidden hot spots of ...

PORTLAND, Ore. — Bullseye Glass and Precision Castparts both had to put out millions of settlement dollars after they were involved in class action lawsuits regarding their air pollution levels. Those ...

Air pollution is one of the world’s invisible killers. It causes seven million premature deaths a year, making it the largest single environmental health risk, according to the World Health ...

Q: Some of our trees (dogwood, dwarf fruit trees, especially on the north side of lot) and shrubs (azaleas) are covered in dried moss to differing degrees (furry patches to whole branches covered).

Q: If I apply lime to my lawn, will it rid it of moss? A: Lime doesn’t kill or even harm existing moss. The only effective way to rid your lawn of moss is to rent a power-dethatching machine to remove ...

Q: I think few people are aware of ball moss and that only a fraction of them do anything about it. On the internet, you will find that the experts maintain that ball moss is not a parasite, it will ...

England’s first pollution-busting “moss tree” has been installed in Newcastle, where it will purify air in the city centre and create opportunities for research into the benefits of the plants’ ...