There are three primary ways that naturally occurring radioactive isotopes decay: 1  Alpha particle emission. 2  Beta particle emission. 3  Gamma radiation emission.
President condemns Ankara attacks. The current migration crisis is a problem of the entire EU and not of a particular country, Polish President Andrzej Duda said after the end of the Visegrad Group two-day summit in Balatonfuered, Hungary, on Friday.
In December 1990, Walesa was elected president. It was the end of the communist governmental system in Poland. Into the 1990s, Solidarity gradually lost its influence as a political party, but did become one of the largest trade unions in Poland.