This month no less than 140 countries signed a legally binding agreement to curb their mercury emissions. While mercury is no greenhouse gas, it is a serious problem for both the environment and human health.
To the World Health Organization (WHO) : ” “The inhalation of mercury vapour can produce harmful effects on the nervous, digestive and immune systems, lungs and kidneys, and may be fatal. “
It is used in various industrial processes such as small-scale gold mining and is emitted by coal-fired plants. (Guess that makes another reason to stop using it…)