<prompt> tafadhali geuza maudhui haya ya swahili kwenda kwa kiingereza.wanapendekeza hatua za ziada kuhakikisha kuwa bei ya uzalishaji wa gesi chafu inaonyesha vizuri gharama zao za mazingira.  <response>: careful design decisions are needed, however, to ensure that the emissions trading system provides strong incentives for greenhouse gas reductions. 