Negative: 1  Pollution increased, working conditions were harmful, and with the employed of women and young children, making them work long and hard hours. 2  From the time of its start, the factories and industry has increased the amount of carbon dioxide in the atmosphere by two-folds.
Causes of the Cold War. Cite This Source. Causes of the Cold War Summary & Analysis. In 1945, the United States and Soviet Union were allies, jointly triumphant in World War II, which ended with total victory for Soviet and American forces over Adolf Hitler's Nazi empire in Europe.
Many observers have suggested that the start of the cold war occurred with the death of US President Franklin D. Roosevelt in April 1945. His successor, Harry S. Truman immediately rounded on the Soviets and informed Josef Stalin that he would take a much harder line with them.