there are others like earthquakes, floods and

there are others like earthquakes, floods and wars that are considered bad and undesirable. Observe the environment you live in and prepare a list of changes, which take place over a long period of time and those, which take place within a short period of time. Do you know why some changes are considered good and others bad? Prepare a list of changes, which you notice in your daily life and give reasons why some of these are considered good and others bad.