What will happen if you do not take care of your earth?

This is a somewhat broad question since there are many different ways in which we can either take care of our Earth or fail to do so. In general, if we do not take care of our Earth, environmental conditions will worsen, and we will have a damaged world in which to live. There are a wide range of unfortunate consequences which can result, which include flooding, starvation, epidemics, war, etc.