The burning of fossil fuels in factories to make products and power, and the fuels used by trucks, automobiles and jet planes have caused acid rain and a great increase in carbon dioxide and pollution in the atmosphere. And forests have been destroyed which used to absorb carbon dioxide. Carbon dioxide traps heat in our lower atmosphere.
Scientists believe that human activities such as these have led to global warming.
Global warming (worldwide increased temperature) is causing glaciers to melt, seas to rise, climates to change, violent weather, destruction of coral reef ecosystems, crops to die, famine, floods, topsoil to wash away, droughts, and the loss of plants and animals.
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