Population has increased tremendously. Since 1804, the worlds population has increased faster and faster. From the beginning of time to 1804 the population has reach the amount of one billion people. Statistics show the amount has increased to about 1.6 billion by the year 1900. That is only one century later. The same statistics show that a century later there would be approximately 6 billion people, and 9 billion by the year 2050. The growing global population will have substantial effect on land use, air and water resources,and food production and distribution process. All of our resources are being destroyed and engineers are put to the test to make the world a cleaner and healthier place to live.