Present-day efforts to cut mercury emissions may reduce pollution more quickly than current models

Most importantly, the new study shows that mercury concentrations in the atmosphere respond more quickly to changes in emissions than most current models predict. For example, concentrations decreased quickly after the Gold Rush and after environmental legislation was enacted to reduce emissions in the 1970s. This suggests that future efforts to cut mercury emissions will have a larger impact on reducing pollution than current models predict.
http://www.news-medical.net/news/20150630/Present-day-efforts-to-cut-mercury-emissions-may-reduce-pollution-more-quickly-than-current-models.aspx