What was the major cause of the power plant explosion at Chernobyl? human error. Which of these was the main pollutant released by the Chernobyl power plant explosion? nuclear radiation. The map below best illustrates which of the following problems? transboundary pollution. Which of these is a major cause of acid rain? . burning fossil fuels for energy. Which one of these is not a direct result of acid rain? spread of disease. Power plants and factories in Europe’s “Black Triangle” are doing which of these to reduce acid rain? installing smokestack scrubbers. How did the accidental spill of cyanide at a mine in Romania spread to neighboring countries? Rivers carried cyanide to other countries.. general pollution.. The word transboundary means across country boundaries. a river and all the streams that flow into it. The streams that flow into a river are called tributaries river system. the release of harmful substances into the environment as the result of an accident, such as an oil tanker spilling oil into the sea accidental pollution. Chernobyl occurred in what city and country? Pripyat Ukraine. What creates pollution? human activities. About ___ % of the radioactive dust from Chernobyl fell on Belarus. 70. How many people had to leave their homes after the Chernobyl incident? 135,000. What are the two chemicals that are given off when lignite burns? sulfur dioxide, nitrogen oxide. In what year did coal burning factories begin building very high chimneys? 1950's. True or False: Germany, Poland, and the Czech Republic make up the "Black Triangle" True. January 30, 2000. How many countries in Europe are part of the Danube river system? 13. What continents have the highest acid rain levels? North America, Europe. True