I want to know the answer to the following question:
What did the Belorussians wish to be cleaned up?
All the background I'm provided with is that "Later, they gathered in the city center near the government's headquarters, where speakers demanded resignation of Yefrem Sokolov, the republic's Communist Party leader, and called for the evacuation of half a million people from the contaminated zones.". Is that enough to answer the question?
Answer: no