Car exhaust. Infiltration. Carbon dioxide. What do these three have in common? They are examples of enemies of nature. Is there anything that can save us from this horror? Yes, there is! This method is all natural, biodegradable and extremely trendy. The solution is... Hanging gardens. Our entire future is in crisis, as we pollute our earth daily. Driving to work produces enough exhaust fumes to kill a child. Breathing Mumbai air is equivalent to smoking about 2 packs of cigarettes a day. Rooftop gardens are innovative and creative and can be praised through history, creation and environment. Humans have grown plants on top of structures since ancient times. The ancient civilization of Mesopotamia had above-ground tree and shrub plantations. An example dates back to Roman times, in the Villa dei Misteri in Pompeii. Here some people had a raised terrace, where plants were grown. A hanging garden was also discovered around an audience hall in Roman-Byzantine Caesarea. A very famous example of a hanging garden in history is the Hanging Gardens of Babylon. At the time, hanging gardens served many purposes, such as food, clean water filtration, and decoration. Nowadays, rooftop gardens can still serve other purposes, but their main goal is to keep the city's pollution rate low. Gardens are placed so high that they can reach more of the rising carbon dioxide and can filter our air more efficiently. These structures may be beautiful to look at, but have you ever considered the work that goes into creating such a structure? Building a rooftop garden is extremely difficult, but easy to maintain. To own one, you need to get plants that can support your region's climate. You need to know if you… half of paper… the truth, rooftop gardens will never solve global warming or other global problems, but they will reduce the level of pollution to half of what it is. If every building in New York had a rooftop garden, instead of gray clouds and acid rain, New York would become a beautiful, clean society. Rooftop gardens have been impacting society since 400 BC, and still do so now. These gardens are easy to build and easy to maintain. These “Sky Gardens” have created birdhouses, clean, crisp air, and stunning designs. Many people argue about how to eliminate pollution, but the answer is right in front of them! We can see these gardens through history, creation and environment. If every building in the world spent a small portion of its time creating these gardens, our world would become the beautiful, clean, natural metropolis it was before.