During World War I, the government nationalized telephone and telegraph lines in the United States from June 1918 to July 1919, when, after a joint resolution of Congress, President Wilson issued an order putting them under the direction of the U.S. Post Office.
Quick Answer. Some of the things that cause temperatures change on Earth include the greenhouse effect, the amount of heat from the sun reaching Earth, deforestation and changes in Earth's surface with regards to reflectivity. Temperature change on Earth has become a major topic of debate in recent years because of its negative effects.
Natural Causes of Climate Change. Orbital Changes. Milankovitch cycles over the past 1 000 000 years. The Milankovitch Theory explains the 3 cyclical changes in Earthâs orbit and tilt that cause the climate fluctuations that occur over tens of thousands of years to hundreds of thousands of years. You have learned about these orbital changes in the Temperature over Time module.