Mercury is among toxic pollutants with harmful effects on humans. Mercury in aquatic eco-systems originate from atmospheric pollution and ends up in aquatic systems where fish get exposed to different levels of mercury concentrations in water. Direct injections of pollutants, involving other types, can occur also from agriculture, industry and household. Here are simple facts on mercury pollution in aquatic systems.

https://www.youtube.com/watch?v=xRqAS4Eow-c&feature=youtu.be

In the next video we are demostrating how pollution gradually degraded the water quality in natural aquatic systems making then of less recreation and economic value.  Water quality monitoring, assessment and regulations are essential management instruments for protection and preservation of natural waters against all types of pollution. Protection of air and water qualities have feedback effetcs on health of humans and safety of the environment, they are also imperative for achieving sustainable socio-economic developments.

https://www.youtube.com/watch?v=T53IeowjRCc&feature=youtu.be