[caww]

Hawaii is getting a haze of this stuff...(Vog)...not good.

[Myrddin]

Yellowstone National Park is a 2 hour drive from my house. My wife and I visited often between 2003 and 2008. When the wind is still, the low lying areas accumulate hydrogen sulfide gas. There have been many incidents of bison killed by H2S under those conditions. We don't visit the park on calm days. With a good breeze, the occasional waft of rotten egg smell is encountered.