he Ciomatu Massif, part of the Eastern Carpathian volcanic chain, is the site of intense post-volcanic activity, where CO2 reaches the surface either through dry gas emissions or dissolved in water.  In certain places, due to the intense microbial activity occurring in the Earth’s crust, sulfuric acid may appear in the water alongside H2S, manifesting as highly acidic waters. Such springs are extremely rare on Earth, but a few of them are found on Mount Puturosu, at Băile fetelor Apor. The students, accompanied by Dr. Andreea Zsigmond, visited this site, where they took on-site measurements and collected samples for subsequent chemical analysis.

Lake Sfânta Ana and the Mohoș peat bog are located in the two craters of a twin crater system, with Mohoș being the older of the two. The students visited the newly opened Eco-Center, where they could learn in-depth information about the region, the history of the twin craters, and the unique wildlife of the peat bog. At the site, they were welcomed by Elek Levente Dósa, president of the Pro Szent Anna Association. The unique wildlife of the peat bog was presented by Dr. István Urák, biologist and associate professor at the Faculty of Life Sciences and Sport from Sfântu Gheorghe.