This year in Poland, popular campaign of the WWF environmentalists "Earth Hour" takes on a new shape of the "Porpoise Hours". Activists point out that the only Baltic mammal is critically endangered. It is estimated that only 450 animals of this species live in the Baltic.
How does the chemical composition of water in the Revelva catchment on Spitsbergen change? How do pesticides, heavy metals entering the waters as a result of human activities, alter local ecosystems? Katarzyna Kozak, PhD student at Gdańsk University of Technology is looking for answers.