President Andrzej Duda of Poland has signed the Act on Alien Species into law, aiming to combat invasive plants and animals that threaten native species and implement European Union regulations. The act establishes procedures for controlling alien species, including border controls and cooperation between member states. It also introduces penalties for introducing invasive species and creates a central register to track their occurrence. The regulations also address the issue of amateur circuses, ensuring they are not exempt from species possession bans.