Oxides of sulfur, carbon, and nitrogen are emitted into the air when fossil fuels like gasoline, coal and fuel oils are burned. Sulfuric acid, carbonic acid, and nitric acid are formed when these oxides combine with moisture in the air. When these acids are brought to Earth it is called as acid rain by way of rain and snow. During the 20th century, the quality and stability of the Earth’s environment was put under great threat due to the acidity of the air and acid. The industrialized nations of the Northern Hemisphere—the United States, Canada, Japan, and most of the countries of Eastern and Western Europe were responsible to produce most of this acidity. Various plans to reduce emissions were suggested and implemented by Environmental agencies around the world, and these were to some extent successful—between 1980 and 1999, sulfur dioxide emissions were recorded to have decreased by approximately 40 percent in the United States and roughly 65 percent in Europe. In spite of these efforts, however, ecosystems around the world were in for a massive damage. Many forms of life, including human life are affected by acid rain. Lakes, rivers, and streams and on vegetation are also affected by Acid rain. Acidity in water kills virtually all life forms.