Why can plants and people not live everywhere?

Humans and plants can not live everywhere. Our adaptations are sometimes our limitations. For example, humans can't live in oceans or in harsh climates for longs periods of time, which limits our capability to survive. The same is ture for plants, if they don't have the conducive enviroment they need to grow and florish, then there won't be any growth. So, as a conclusion, humans and plants cannot live EVERYWHERE!