Public health and environmental problems were bad for the people of rome
The fastest way to communicate across continents in the 1500s was by ship. If you wanted to bring a certain message across a continent than there was no faster way than actually sending it on a ship and waiting for the ship to arrive safely to the other continent.
In America, Japanese internment camps were created.
Victory gardens, were vegetable, fruit, and herb gardens planted at private residences and public parks in the United States, United Kingdom, Canada, Australia and Germany during WWI and WWII. They were used to help prevent food shortages, to make sure there was food for everyone