My media item is about climate change. According to Angela Leeper, an expert on this subject, climate change is an increase in global average temperatures. This problem causes more frequent snowstorms and colder temperatures in northern regions while southern regions get a dryer and a hotter climate. These changes destroy ecosystems and limit slowly but surely global food supply. This causes millions of people and animals to migrate to safety. This is mainly because of human activities that generate tons of destructive gas such as carbon dioxide.