30-day challenge #11: Rural vs Urban Since the Industrial Revolution in the XVIII century, the rural exodus has been growing and growin. The city needed low-cost-labour for the industries to increase the production numbers. Still nowadays people keep moving to urban centres for the many different opportunities it offers. Data shows us there are over 400 cities with a million people. Around 40 cities in the world have over 5 million people, which are known as "megacities." Besides job opportunities, there also other reasons such as better educational and health systems. However, the urban growth may cause negative impacts in the environment. Deforestation is an example: people need more space to erect buildings, more roads to pave, and so on. Less trees, less nature, and more carbon dioxide. That can increase the global warming.