Answer :
The correct answers are collectives disbanded, foreign investors, industries closed, nations joined the European Union and the fall of the Soviet Union.
The factors responsible for environmental improvements in Eastern Union during the 1990s were: collectives disbanded, foreign investors, industries closed, nations joined the European Union and the fall of the Soviet Union.
Eastern Europe has faced many problems after the dissolution of the Soviet Union but the changes in the use of the land have improved the environmental conditions in that region. Let’s remember that the erosion of the land in Eastern Europe was caused by overgrazing, deforestation, and farming. The greatest environmental issue for Eastern Europe is freshwater. Although the industry has generated many pollutants in the air, it is a problem that has been controlled in recent years due to the strict environmental policies of the European Nation.