Hot summer days by the lake, river, or sea are often unimaginable without inflatable mattresses, colorful rings, wakeboards, paddleboards, or water bikes. These water…
In summer, we like to spend time by lakes, ponds, rivers, and the Baltic Sea. Sometimes instead of clear water, we notice a greenish or bluish surface, the water looks murky, and the surface…
We can evaluate the heavy metal cobalt in two ways. On one hand, due to its unique properties, it is widely used in various fields – from art to medicine, from phones to…
