Data per application on import, export and consumption from national SF6 and PFC producers and distributors will suffice, provided that (i) all SF6 and PFC producers and distributors are identified, (ii) domestic consumers only purchase SF6 and PFCs from national suppliers, and (iii) imports and exports in products (e.g., sport attributes) are negligible. It is good practice to check regularly for additional distributors to ensure that no gas is imported directly (in bulk) by end-users and that identified products containing SF6 or PFCs are not imported in sizeable amounts.
Alternatively, if top-down data on chemical consumption is not available, countries may use information on the number of accelerators, AWACS, windows, etc. in use in the country, applying the emission factors that are supplied in the method for each source category.
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