This study compared using additional wind energy or converting Ireland's largest coal plant to biomass to meet Ireland's renewable energy target of 40% for 2020. It found that adding more wind capacity as currently implemented was preferable to biomass. Wind was determined to be relatively inexpensive, low emitting, and rely on secure domestic resources, while biomass was costly, insecure due to reliance on uncertain foreign supplies, and raised sustainability concerns over using forest biomass for electricity. The study concluded Ireland should continue expanding wind power and explore complementary options like solar, biomethane, and grid connections.