<prompt> Translate the following text to EnglishKumbuka kwamba gharama za kuongezeka zinatokana na mwaka 2002 katika matukio yote manne ili kuzalisha kupunguzwa mapema ambayo inaweza kuhifadhiwa kwa matumizi ya 2007 na baadaye.  <response>: Note that incremental expenditures are incurred as early as 2002 in all four scenarios to generate early reductions that can be banked for use in 2007 and beyond. 