Since 2017, the city of Aspen’s water use has remained steady, illustrating the difficulty of reducing consumption through voluntary conservation measures amid continued growth and the effects of ...

Illicit drug use among U.S. teenagers held steady in 2000 for the fourth straight year, and cigarette smoking declined significantly, the government reported Thursday. The annual Monitoring the Future ...

When measuring the temperatures and pressures of an operating refrigeration system, it is important to allow it to achieve a steady state operating condition. This allows for the measured pressures ...