In the 1990s, politicians and some scientists began to insist that there is a “global warming” caused by the burning of oil and the release of chlorofluorocarbons, a chemical. They blamed factory smokestacks and automobiles, and especially refrigerators and air conditioners. The loss of trees in rain forests was also supposedly a cause of global warming. Regulators began banning the use of certain chemicals in hairspray, and the Kyoto (Japan) Treaty was proposed to limit the pollution each country could generate each year. But the United States Senate has never ratified the Kyoto Treaty. | In the 1990s, politicians and some scientists began to insist that there is a “global warming” caused by the burning of oil and the release of chlorofluorocarbons, a chemical. They blamed factory smokestacks and automobiles, and especially refrigerators and air conditioners. The loss of trees in rain forests was also supposedly a cause of global warming. Regulators began banning the use of certain chemicals in hairspray, and the Kyoto (Japan) Treaty was proposed to limit the pollution each country could generate each year. But the United States Senate has never ratified the Kyoto Treaty. |