* Based on volatile organic compounds (VOC) emissions.
Source: U.S. Environmental Protection Agency (1996).
monoxide, ground-level ozone, lead, nitrogen dioxide, particulate matter, and sulfur dioxide. These chemicals are sometimes referred to as ''criteria pollutants." In addition, there are many other constituents of the atmosphere that may have impacts of economic consequence. Table 4-6 lists some other components of air pollutants, including air toxins (e.g., benzene), stratospheric ozone depleters (e.g., CFCs), and greenhouse gases