As you yourself observe and find that the environment is never static. One of its most significant characteristics is its dynamism. It is continuously changing. Both the biotic and the abiotic elements in the environment are dynamic by their nature. Let us understand what is this dynamism and how it works. 

The environment differs from place to place and also from one time in history to another. For example, the environment of the Himalayas is different from that of the Great Indian Desert, and even there it is not the same over the years and decades. Climatic conditions change in different places in different seasons. 

If you observe the evolution of the environment of the same place, say over a period of 20 or 30 years, you will find that the environment of that place has changed. Some changes take place naturally, while others are caused by the activities of human beings. Even the human-made environment has been undergoing changes over a period of time and space. There have been notable changes in human dwellings. 

The skyscrapers that you see today in many cities were not present about 20 years ago. A number of villages have developed into towns, cities and mega-cities. Means of transport and communications have been revolutionized. All these changes and developments show the dynamic nature of the environment. Observe, think and understand the kinds of changes that have taken place within the last couple of years in the human-made environment in the city or village where you live. The environment is dynamic in nature and keeps on changing

Source NIOS