The global increase in temperature and the resulting climate change, known as global warming, could pose a threat to the environment and have serious negative effects on all living beings, including man. Scientists agree that temperatures on Earth are rising, but no agreement has yet been reached on the causes and how the government should address the problem is still up for debate. The debate is between those who consider climate change in the last century to be a completely natural event, something that has already happened throughout history, with the Earth going through periods of rising and falling temperatures, and who think it cannot be stopped or modified by people, and who consider humans and industries to be the reason the Earth created the Earth. In any case, they perceived that none of these changes would appear before the 21st century, but severe droughts in the American Midwest, Russia, and Africa in that decade demonstrated that the results of global warming were not as far off as they thought. In 1974, a study by the United States Central Intelligence Agency (CIA) revealed that climate change will occur in the coming decades, with food supply shortages leading to migration and war. At this point, the government decided to legislate on environmental impact assessment: it consulted experts on expected factory emissions and studied the impact of deforestation, acid rain and other large-scale climate activities, focusing not only on impacts on ecosystems but also on human health and economic activities (History of global governments and international bodies have begun to take a greater interest in the issue, and the Stern Review “Economics of Climate Change” in 2006, by Nicholas Stern, former chief economist of the World The bank, and a staff of 20, was the full cost report at the time. The confusion was that global warming was at the upper end of the 21st century scientists' hypothesis, which will result in a cut in output. annual global domestic product of 5. %, and that the cost of preventing global warming was 1% of annual global domestic product (History of Global