People in Britain often talk about climate and weather. They usually complain about their ___CHANGEABLE___ weather. However, there are parts of the world where extreme weather causes real dangers to the ___POPULATION___. Sandstorms, tornadoes and floods ___REGULARLY___ cause massive destruction. Lots of people become ___HOMELESS___. To prevent this destruction, it’s important to forecast disasters in advance. Japan is the world ___LEADER___ in using new technology for this purpose. The Japanese have also worked out an ___EFFECTIVE___ system of informing people: phone companies automatically notify their customers about emergencies and disasters. These warnings are very efficient, and free of charge.