The measure of how well a material (a window, door, or other construction element) conducts heat; the inverse of the R-value. The smaller the U-factor, the less heat is transmitted.
Racial discrimination takes many insidious forms. This term refers to a situation in which industrial operations, environmental policymaking, and the enforcement (or lack of enforcement) of environmental laws unfairly impact a particular race of people, either intentionally or unintentionally. Examples include the locating of hazardous waste landfills in minority communities, and the exclusion of minorities in environmental policymaking leadership. See also, environmental justice.