INTRODUCTION For several decades,we have periodically seen concern expressed about our environment and energy usage.The supply and cost of oil,the“hole”in the ozone layer,and various forms of pollution have at times...INTRODUCTION For several decades,we have periodically seen concern expressed about our environment and energy usage.The supply and cost of oil,the“hole”in the ozone layer,and various forms of pollution have at times also caught the attention of legislators and government officials who shape our laws.The U.S.Department of the Interior was created in 1949,and the first federal clean air act was enacted in 1955.In 1970,President Nixon formed the Environmental Protection Agency(EPA),and the first celebration of Earth Day was April 22,1970.States have also enacted various laws over the years in efforts to reduce pollution.展开更多
文摘INTRODUCTION For several decades,we have periodically seen concern expressed about our environment and energy usage.The supply and cost of oil,the“hole”in the ozone layer,and various forms of pollution have at times also caught the attention of legislators and government officials who shape our laws.The U.S.Department of the Interior was created in 1949,and the first federal clean air act was enacted in 1955.In 1970,President Nixon formed the Environmental Protection Agency(EPA),and the first celebration of Earth Day was April 22,1970.States have also enacted various laws over the years in efforts to reduce pollution.
