You probably heard about Japan's horrible nuclear disaster, which took place in the first half of 2011. A minimum imperfection in a nuclear plant's system was enough to leave Japan and the rest of the world in a strong crisis. People in Japan were moving all around the country to find areas which were not affected by radiation. Others preferred to cross the borders and move to other countries of Asia or even Europe. There were a few who stayed inside the affected areas, trusting they wouldn't be harmed, as they were economically unable to move anywhere else. Other countries in the other side of the world like The United States, Central American countries, Mexico, and South America areas were worried about the radiation traveling through the air and reaching their lands in the form of acid rain. This is not as mythical as it sounds. In fact, it was very probable that this radiation could pollute the clouds and invade the rain in an invisible way. Little by little the radiation would've fallen from the sky and ruined thousands of square miles of terrain, making it infertile. Not to mention what could've happened to people who had contact with this substance.