Original sentence: The closure of unit 3 resulted primarily from Western political pressure.Under an agreement with western nations, Ukraine agreed to close the Chernobyl plant by the year 2000.Western pressure was largely motivated by memories of the chernobyl disaster that occured in 1986
Edited sentence: The reason was that the politicians wanted the Chernobyl plant closed by the year 2000 for no obvious reasons except that it was the same plant where the infamous accident happened in 1986