The Population ExplosionAccording to the Population Reference Bureau, in 1991 there were approximately 5.4 billion people in the world. The global birth and death rate was 27/9, meaning that for every person who dies, three additional babies are born. Between 1990 and 1991, the population increased by 95 million people and continues to grow at this rate today. This may seem harmless, but if we were to think of it as a pond doubling its quantity of water lilies for 40 days, we would see it differently. He would start with one water lily, the next day he would have two, and on the 39th day he would be half full. However, in one day, on the 40th day, it will be completely filled. The Earth's population doubles approximately every 40 years. We don't want to wait until the 79th year to solve our problem, otherwise humanity won't have enough time to overcome the inevitable obstacles that come with overpopulation. In his book, The Population Explosion, Paul Ehrlich, a famous population controller, came up with the equation I = PAT. It estimates that the impact on the environment is equal to population times wealth (i.e. the amount of energy and food consumed by the population) times the amount of destructive technologies available to a person. country. It showed that the impact is directly affected by the population. Therefore, a larger population has a greater impact on Earth's water, air and land. A common problem people think is associated with overpopulation is lack of space to live, but it also leads to many other environmental problems. More people are using more cars, needing more firewood, and drinking more water. This leads to more air pollution, more land destroyed, and more water lost. Therefore, population control is necessary internationally in order to protect our environment. Some experts believe that population control is not necessary like in Singapore. The government of Singapore decided that it would be best for the country to increase its population so that it could support its economy. Many less developed countries promote population growth because they want their economies to grow. Experts who believe it is best for us to let the population increase or decrease on its own also believe that overpopulation will never become a problem..