Species Chemical Formula 100 Years GWP Atm. Importantly, future emissions of halocarbons and other halogenated compounds strongly depend on the technologies involved in their production and use. New uses for these substances may arise or new products or technologies may replace current uses. It is assumed here that the current mix of products continues to exist for the next 100 years to 2100, with some generic technological improvements as described below. This assumption, however, means that emissions projections for industrial gases discussed in this section carry a substantial uncertainty.
Halocarbons are carbon compounds that contain fluorine, chlorine, bromine, and iodine.
The six modeling teams participating in the SRES process did not develop their own projections for emissions of ODS and their substitutes. Hence, a different approach for the development of long-range estimates for halocarbons and other halogenated compounds was adopted. Also, the assumed future control rates have been adopted to conform to the SRES storylines presented in Chapter 4 . The resultant emissions of Montreal gases, HFCs, PFCs, and SF 6 are summarized in Table 5-8 . The effect on climate of each of the substances listed in Table 5-9 varies greatly because of differences in both the atmospheric lifetime and the radiative effect per molecule of each gas.