Answer:
The exchange introduced a wide range of new calorically rich staple crops to the Old World—namely potatoes, sweet potatoes, maize, and cassava. The primary benefit of the New World staples was that they could be grown in Old World climates that were unsuitable for the cultivation of Old World staples.
<span>The terrible meltdown at Chernobyl, in "Russia", spread radiation across Europe, since this was one of the worst nuclear disasters in world history, along with those in the United States and Japan. </span>
