combined heat and power in ireland trends issues 1991 2002 february 2004 2 sustainable energy sei is s national authority established on may 1st under the act has a mission to promote assist development of this encompasses environmentally economically production supply use support government policy across all sectors economy its remit relates mainly improving efficiency advancing competitive deployment renewable sources reducing environmental impact particularly respect greenhouse gas emissions charged with implementing significant aspects green paper climate change strategy as provided for plan manages programmes aimed at assisting superior technologies each sector required raising awareness providing information advice publicity best practice stimulating research demonstration preparation necessary standards codes publishing statistics projections achievement targets responsible advising policies