Processing of oil and gaz industry

Has the climate of the United States changed significantly during the century that is about to end? In what ways and by how much? Have national trends emerged that agree--or perhaps disagree--with what is expected from projections of global greenhouse warming? These are questions addressed in a report entitled "Trends in U.S. Climate during the Twentieth Century," by Thomas R. Karl, Richard W. Knight, David R. Easterling, Robert G. Quayle who serve on the scientific staff of the National Oceanic and Atmospheric Administration's National Climatic Data Center (NCDC), in Asheville, North Carolina.