In our new generation of technology and advanced civilization it is difficult to believe that our world is in the water crisis. This crisis affects not only the low-developed regions of the world but also advanced countries, and about one-third of people are suffering from water shortage (Molden, 2010). One of the main reasons is overpopulation. In the case of an increase in water demand, we can not update ourselves now. Another factor in the shortage of water is water conservation.
In Mexico City, Mexico, approximately 30 million inhabitants are emitting air pollution, smoke and waste into neighboring rivers and branches. However, in this case, the shortage of water is also the main cause of the problem. The groundwater well is contaminated with chemicals in the soil of the land that several lakes covered hundreds of years ago. In other places such as Buenos Aires in Argentina, slaughterhouses abandoned the remains of the left side of the Rapurata River because the polluted water eventually decayed. In 1991, about 3,000 cattle lungs were inserted into the river to function as a garbage system. Cow's lungs, dead pigs, horses, cows, fish float every day in the river
Mexico City faces a shortage of water because the underground aquifer to be stored drains faster than make-up water. In addition, disproportionate drainage of the aquifer will cause the city to sink, causing other various problems. Listen to this story and learn about the problems faced by this big city due to high groundwater demand. Traffic that is often considered a city problem has long been a problem in Yosemite National Park. Due to forest fires, parks are occasionally closed due to traffic jams, and hundreds of cars return when they are reopened and enjoy the magnificent natural beauty of the park. Recently, as the number of bear deaths in the park increases, finding a solution to this problem is becoming more important. Please listen to how this traffic jam in this popular national park will affect the experience of wildlife and visitors.